Spin Dynamics

We have worked on the spin dynamics of a wide variety of materials.  One focus area has been on isotropic ferromagnets, which indicates that (ideally) it takes no energy to uniformally rotate the entire spin system.  This basic property is found in a remarkable number of systems, including itinerant electron systems like iron and nickel, Invar ferromagnets, "soft" amorphous materials like metglas, and colossal magnetoresisitve systems like La-CaMnO3.  We have also worked on heavy fermion systems, the spin dynamics of superconducting materials, and the spin dynamics of frustrated magnets.

 

Isotropic Ferromagnets

We have a longstanding interest in the properties of isotropic ferromagnets.  The key physical property of an isotropic ferromagnet is that it takes no energy to uniformly rotate the entire spin system.  This uniform rotation corresponds to a spin wave excitation of infinite wavelength, or wave vector q=2π/wavelength=0. This implies that the excitations obey the Goldstone theorem, in that the dispersion relation E(q) for the excitations must approach zero as q goes to zero:  E(q→0)→0.

 

    Itinerant Electron Systems

 

Temperature Dependence of the Magnetic Excitations in Nickel, H. A. Mook, J. W. Lynn and R. M. Nicklow, Phys. Rev. Lett. 30, 556 (1973).

Magnetic Excitations in Iron and Nickel, H. A. Mook, J. W. Lynn and R. M. Nicklow, AIP Conference Proceedings #18, 781 (1973).

Dynamic Susceptibility Calculations in Ferromagnetic Iron, J. F. Cooke, J. W. Lynn and H. L. Davis, AIP Conference Proceedings #24, 329 (1974).

Temperature Dependence of the Magnetic Excitations in Iron, J. W. Lynn, Phys. Rev. B 11, 2624 (1975).

Spin-Wave and Critical Scattering of Neutrons From Cobalt Disulfide, M. Iizumi, J. W. Lynn, A. Ohsawa and H. Ito, AIP Conference Proceedings, #29, 266 (1975).

Numerical Investigation of Spin Waves in Ferromagnetic Iron, J. F. Cooke, J. W. Lynn and H. L. Davis, Sol. State Comm. 20, 799 (1976).

Calculations of the Dynamic Susceptibility of Nickel and Iron, J. F. Cooke J. W. Lynn and H. L. Davis, Phys. Rev. B 21, 4118 (1980).

Temperature Dependence of the Dynamic Susceptibility of Nickel, J. W. Lynn and H. A. Mook, Phys. Rev. B 23, 198 (1981).

Observation of Spin Waves in Pd(1.5% Fe), J. W. Lynn, J. J. Rhyne and J. I. Budnick, J. Appl. Phys. 53, 1982 (1982).

Addendum to `Temperature Dependence of the Magnetic Excitations in Iron', J. W. Lynn, Phys. Rev. B 28, 6550 (1983).

Neutron Scattering Study of the Magnetic Excitations in Ferromagnetic Iron at High Energy Transfers, C.-K. Loong, J. M. Carpenter, J. W. Lynn, R. A. Robinson and H. A. Mook, J. Appl. Phys. 55, 1895 (1984).

Breakdown of Dynamic Scaling Analysis in Isotropic Ferromagnets, J. W. Lynn, Phys. Rev. Lett. 52, 775 (1984).

A Polarized Neutron Measurement of Forbidden Magnon Scattering in Pt3Mn, W. H. Li, C. H. Perry, J. B. Sokoloff, J. W. Lynn, R. M. Nicklow, J. Appl. Phys. 57, 3751 (1985).

The Magnetic Response of Paramagnetic Fe at High Energy Transfers, P. J. Brown, H. Capellmann, J. Deportes, D. Givord, S. M. Johnson, J. W. Lynn and K. R. A. Ziebeck, J. de Phys. 46, 827 (1985).

Measurements of the Magnetic Excitations above TC in Fe and Ni, H. A. Mook and J. W. Lynn, J. Appl. Phys. 57, 3006 (1985).

Nature of the Magnetic Excitations above TC in Ni and Fe, J. W. Lynn and H. A. Mook, J. Mag. Mag. Mater. 54-57, 1169 (1986).

Direct Observation of Spin Waves above TC in Nickel, H. A. Mook and J. W. Lynn, Phys. Rev. Lett. 57, 150 (1986).

Neutron Scattering Study of the Magnon Energies and Intensities in Iron, M. Yethiraj, R. A. Robinson, D. S. Sivia, J. W. Lynn, and H. A. Mook, Phys. Rev. B 43, 2565 (1991).

Lattice and Spin Dynamics in bcc Fe, 10 at % Be, P. Zhao, J. Cullen, M. Wuttig, J. W. Lynn, T. A. Lograsso, and O.  Moze, J. Appl. Phys. 99, 08R101 (2006).

Spin wave Dispersion in Magnetostrictive Fe-Ga Alloys:  Inelastic Neutron Scattering Measurements, J. L. Zarestky, O. Moze, J. W. Lynn, Y. Chen, T. A. Lograsso, and D. L. Schlagel, O.  Moze, Phys. Rev. B 75, 052406 (2007).

Effect of Antiferromagnetic Spin Correlations on Lattice Distortion and Charge Ordering in Pr0.5Ca1.5MnO4, S. Chi, F. Ye, P. Dai, J. A. Fernandez-Baca, Q. Huang, J. W. Lynn, E. W. Plummer, R. Mathieu, Y. Kaneko, and Y. Tokura, Proceedings of the National Academy of Sciences 104, 10796 (2007).

Paramagnetic Spin Correlations in Colossal Magnetoresistive La0.7Ca0.3MnO3, Joel S. Helton, Matthew B. Stone, Dmitry A. Shulyatev, Yakov M. Mukovskii, and Jeffrey W. Lynn, Phys. Rev. B 85, 144401 (2012).

 

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    Invar Systems

 

Spin Waves in Amorphous Fe1-xBx Alloys, J. J. Rhyne, G. E. Fish, and J. W. Lynn, J. Appl. Phys. 53, 2316 (1982).

Spin Dynamics of the Amorphous Invar Alloy Fe0.86B0.14, J. A. Fernandez-Baca, J. W. Lynn, J. J. Rhyne and G. E. Fish, J. Appl. Phys. 57, 3545 (1985).

Long Wavelength Spin-Wave Energies and Linewidths of the Amorphous Invar Alloy Fe100-xBx, J. A. Fernandez-Baca, J. W. Lynn, J. J. Rhyne and G. E. Fish, Phys. Rev. B 36, 8497 (1987).

Polarization Analysis of the Magnetic Inelastic Scattering of Invar Fe86B14, J. W. Lynn, N. Rosov, C-H. Lee, Q. Lin, and G. Fish, Physica B 180-181, 253 (1992).

Polarization Analysis of the Magnetic Excitations in Invar and Non-Invar Amorphous Ferromagnets, J. W. Lynn, N. Rosov, and G. Fish, J. Appl. Phys. 73, 5369 (1993).

Temperature Dependence of the Magnetic Excitations in Ordered and Disordered Fe3Pt, N. Rosov, J. W. Lynn, J. Kästner, E. F. Wassermann, and H. Bach, J. Appl. Phys. 75, 6072 (1994).

Polarization Analysis of the Magnetic Excitations in Fe65Ni35 Invar, J. W. Lynn, N. Rosov, M. Acet, and H. Bach, J. Appl. Phys. 75, 6069 (1994).

Polarization Analysis of the Magnetic Excitations in Fe72Pt28, N. Rosov, J. W. Lynn, J. Kästner, E. F. Wassermann, T. Chattopadhyay, and H. Bach, J. Mag. Mag. Matr. 140-144, 235 (1995).

 

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    Amorphous Magnets and Nano Materials

 

Neutron Scattering Study of Spin Waves in the Amorphous Ferromagnet (Fe0.3Ni0.7)0.75P0.16B0.06Al0.03, J. W. Lynn, G. Shirane, R. J. Birgeneau and H. S. Chen, AIP Conference Proceedings #34, 313 (1976).

Spin Excitations in Amorphous Transition-Metal Boron Glasses, J. J. Rhyne, J. W. Lynn, F. E. Luborsky and J. L. Walter, J. Appl. Phys. 50, 1583 (1979).

Spin Glass-Ferromagnetic Phase Transition in Amorphous (FexNi1-x).75P.16B.06Al.03, J. W. Lynn, R. W. Erwin, J. J. Rhyne and H. S. Chen, J. Appl. Phys. 52, 1738 (1981).

Evolution from Ferromagnetism to Spin Glass Behavior, J. W. Lynn, R. W. Erwin, H. S. Chen and J. J. Rhyne, Solid State Commun. 46, 317 (1983).

Ferromagnetic and Spin Glass Behavior Near the Critical Concentration in Amorphous (FexNi1-x)75Glass25, J. W. Lynn, R. W. Erwin, J. J. Rhyne and H. S. Chen, J. Mag. Mag. Mater. 34, 1397 (1983).

Magnetic Excitations in Amorphous Isotropic Ferromagnets, H. A. Mook and J. W. Lynn, Phys. Rev. B 29, 4056 (1984).

Spin Stiffness Anomaly in the Reentrant Spin Glass (Fe0.25Ni0.75)0.75P0.16B0.06A10.03, R. W. Erwin, J. W. Lynn, J. J. Rhyne, and H. S. Chen, J. Appl. Phys. 57, 3473 (1985).

Spin Dynamics of Amorphous Fe0.86B0.14, J. A. Fernandez-Baca, J. W. Lynn, J. J. Rhyne and G. E. Fish, Physica 136B, 53 (1986).

Spin Dynamics of Amorphous Fe90-xNixZr10, J. A. Fernandez-Baca, J. W. Lynn, J. J. Rhyne and G. E. Fish, J. Appl. Phys. 61, 3406 (1987).

Low Temperature Spin Waves in Amorphous Fe90-xNixZr10, J. A. Fernandez-Baca, J. W. Lynn, J. J. Rhyne and G. E. Fish, J. Appl. Phys. 63, 3749 (1988).

Spin Wave Excitations in Amorphous Fe78B13Si9, S. C. Yu, J. W. Lynn, J. J. Rhyne and G. E. Fish, J. Appl. Phys. 63, 4083 (1988).

Spin Dynamics of Amorphous Magnets, J. W. Lynn and J. J. Rhyne, in Spin Waves and Magnetic Excitations, ed. by A. S. Borovik-Romanov and S. K. Sinha, Modern Problems in Condensed Matter Sciences, Vol 22.2, Chap. 4 (North Holland, 1988).

Spin Wave Stiffness Constants of the Amorphous Fe90-xNixZr10 (x = 5,10) Alloys, S-C. Yu, J. W. Lynn, and G. E. Fish, Jpn. J. Appl. Phys. 32, 67 (1993).

Neutron Scattering Study of the Magnetism in a Nanocrystalline/Amorphous Material, N. Rosov, J. W. Lynn, and G. Fish, Matr. Res. Soc. Proc 376, 595 (1995).

Neutron Scattering Studies of the Spin Dynamics of Amorphous Alloys, J. W. Lynn and J. A. Fernandez-Baca, Chapter 5 in The Magnetism of Amorphous Metals and Alloys, edited by J. A. Fernandez-Baca and W. Y. Ching (World Scientific, 1995).

Spin Waves Across Three-Dimensional, Close-Packed Nanoparticles, Kathryn L. Krycka, James J. Rhyne, Samuel D. Oberdick, Ahmed M. Abdelgawad, Julie A. Borchers, Yumi Ijiri, Sara A. Majetich, and Jeffrey W. Lynn, (submitted).

 

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    CMR, Multiferroics, and Related Systems

 

Unconventional Ferromagnetic Transition In La1-xCaxMnO3, J. W. Lynn, R. W. Erwin, J. A. Borchers, Q. Huang, A. Santoro, J. L. Peng, and Z. Y. Li, Phys. Rev. Lett. 76, 4046 (1996).

Magnetic, Structural, and Spin Dynamical Properties of La1-xCaxMnO3, J. W. Lynn, R. W. Erwin, J. A. Borchers, A. Santoro, Q. Huang, J. L. Peng and R. L. Greene, J. Appl. Phys. 81, 5488 (1997).

Neutron Scattering Investigation of the Structure and Spin Dynamics in La0.85Sr0.15MnO3, L. Vasiliu-Doloc, J. W. Lynn, A. H. Moudden, A. M. De Leon-Guevara and A. Revcolevschi, J. Appl. Phys. 81, 5491 (1997).

Spin Dynamics of the Magnetoresistive Pyrochlore Tl2Mn2O7, J. W. Lynn, L. Vasiliu-Doloc, and M. A. Subramanian, Phys. Rev. Lett. 80, 4582 (1998).

Spin Dynamics of Strongly Doped La1-xSrxMnO3, L. Vasiliu-Doloc, J. W. Lynn, Y. M. Mukovskii, A. A. Arsenov, and D. A. Shulyatev, J. Appl. Phys. 83, 7342 (1998).

Magnetic Correlations in the Bilayer Manganite La1.2Sr1.8Mn2O7, S. Rosenkranz, R. Osborn, S. K. Sinha, K. E. Gray, J. F. Mitchell, L. Vasiliu-Doloc, J. W. Lynn, and D. Argyriou, J. Appl. Phys. 83, 7348 (1998).

Neutron Scattering Investigation of Magnetic Bilayer Correlations in La1.2Sr1.8Mn2O7, R. Osborn, S. Rosenkranz, D. N. Argyriou, L. Vasiliu-Doloc, J. W. Lynn, S. K. Sinha, J. F. Mitchell, K. E. Gray, and S. D. Bader, Phys. Rev. Lett. 81, 3964 (1998).

Structure and Spin Dynamics of La0.85Sr0.15MnO3, L. Vasiliu-Doloc, J. W. Lynn, A. H. Moudden, A. M. de Leon-Guevara, and A. Revcolevschi, Phys. Rev. B 58, 14913 (1998).

Spin Dynamics of the Magnetoresistive Oxides, J. W. Lynn, Int. J. Modern Physics 12, 3355 (1998).

Spin correlations of the Magnetoresistive Bilayer Manganite La1.2Sr1.8Mn2O7, S. Rosenkranz, R. Osborn, J. F. Mitchell, L. Vasiliu-Doloc, J. W. Lynn, and S. K. Sinha, Int. J. Modern Physics B 13, 3820 (1999).

Spin Dynamics of Magnetoresistive Oxides, J. W. Lynn, The Physics of Manganites, Ed. by T. A. Kaplan and Mahanti (Kluwer Academic/Plenum, 1999), p. 149.

Spin Dynamics and Orbital State in LaTiO3, B. Keimer, D. Casa, A. Ivanov, J. W. Lynn, M. v. Zimmermann, J. P. Hill, D. Gibbs, Y. Taguchi, and Y. Tokura, Phys. Rev. Lett. 85, 3946 (2000).

Low-energy Spin Wave Excitations in the Bilayer Manganite La1.2Sr1.8Mn2O7, S. Rosenkranz, R. Osborn, J. F. Mitchell, L. Vasiliu-Doloc, J. W. Lynn, and S. K. Sinha, J. Appl. Phys. 87, 5816 (2000).

Spin Dynamics in the Ferromagnetic Phase of Colossal Magnetoresistive Oxides, J. W. Lynn, J. Superconductivity:  Incorporating Novel Magnetism 13, 263 (2000).

Charge Ordering and Polaron Formation in La0.7Ca0.3MnO3, C. P. Adams, J. W. Lynn, Y. M. Mukovskii, A. A. Arsenov, and D. A. Shulyatev, Phys. Rev. Lett. 85, 3954 (2000).

Charge Correlations in the magnetoresistive oxide La0.7Ca0.3MnO3, J. W. Lynn, C. P. Adams, Y. M. Mukovskii, A. A. Arsenov, and D. A. Shulyatev, J. Appl. Phys. 89, 6846 (2001).

Neutron and X-ray Evidence of Charge Melting in Ferromagnetic Layered CMR Manganites, L. Vasiliu-Doloc, R. Osborn, S. Rosenkranz, J. Mesot, J. F. Mitchell, S. K. Sinha, O. H. Seeck, J. W. Lynn, and Z. Islam, J. Appl. Phys. 89, 6840 (2001).

Temperature Dependence of Low-Lying Electronic Excitations of LaMnO3, M. A. Quijada, J. R. Simpson, H. D. Drew, J. W. Lynn, L. Vasiliu-Doloc, Y. M. Mukovskii, and S. G. Karabashev, Phys. Rev. B 64, 224426 (2001).

Spin Correlations and Magnetoresistance in the Bilyaer Manganite La1.2Sr1.8Mn2O7, S. Rosenkranz, R. Osborn, L. Vasiliu-Doloc, J. W. Lynn, S. K. Sinha, and J. F. Mitchell, Physica B 312, 763 (2002).

Glass Transition in the Polaron Dynamics in CMR Manganites, D. N. Argyriou, J. W. Lynn, R. Osborn, B. Campbell, J. F. Mitchell, U. Ruett, H. N. Bordallo, A. Wildes, and C. D. Ling, Phys. Rev. Lett. 89, 036401 (2002).

Absence of polaron conductivity in La0.8Ba0.2MnO3, A.A.Arsenov, N.G.Bebenin, V. S. Gaviko, C.P.Adams, J.W.Lynn, V.V.Mashkautsan, Ya.M.Mukovskii, D.A.Shulyatev, V.V.Ustinov, and R.I.Zainullina, Physica Status Solidi (a) 189, 673 (2002).

First-order Transition in the Itinerant Ferromagnet CoS1.9Se0.1, T. J. Sato, J. W. Lynn, Y.-S. Hor, and S-W. Cheong, Phys. Rev. B 68, 214411 (2003).

Spin Correlations and Magnetic Order in Nonsuperconducting Nd2-xCexCuO4+d, P. K. Mang, O. P. Vajk, A. Arvanitaki, L. Lu, J. W. Lynn and M. Greven, Phys. Rev. Lett. 93, 027002 (2004).

First-order Nature of the Ferromagnetic Phase Transition in (La-Ca)MnO3 near optimal doping, C. P. Adams, J. W. Lynn, V. N. Smolyaninova, A. Biswas, R. L. Greene, W. Ratcliff, II, S-W. Cheong, Y. M. Mukovski, and D. A. Shulyatev, Phys. Rev. B 70, 134414 (2004).

Correlated and Uncorrelated Nanoscale Lattice Distortions in the Paramagnetic Phase of Magnetoresistive Manganites, V. Kiryukhin, A. Borissov, J. S. Ahn, Q. Huang, J. W. Lynn, and S-W. Cheong, Phys. Rev. B 70, 214424 (2004).

Disorder-induced polaron formation in the magnetoresistive Perovskite La0.54Ba0.46MnO3, T. J. Sato, J. W. Lynn, and B. Dabrowski, Phys. Rev. Lett. 93, 267204 (2004).

Magnetic Order and Spin Dynamics in Ferroelectric HoMnO3, O. P. Vajk, M. Kenzelmann, J. W. Lynn, S. B. Kim and S.-W. Cheong, Phys. Rev. Lett. 94, 087601 (2005).

Evolution of Spin-Wave Excitations in Ferromagnetic Metallic Manganites, F. Ye, P. Dai, J. A. Fernandez-Baca, H. Sha, J. W. Lynn, H. Kawano-Furukawa, Y. Tomioka, Y. Tokura, and J. Zhang, Phys. Rev. Lett. 96, 047204 (2006).

Spin Dynamics in the Magnetoelectric Effect LiCoPO4 Compound, W. Tian, J. Li, J. W. Lynn, J. L. Zarestky, and D. Vaknin, Phys. Rev. B 78, 184409 (2008).

Polaron Formation in the Optimally Doped Ferromagnetic Manganites La0.7Sr0.3MnO3 and La0.7Ba0.3MnO3, Y. Chen, B. G. Ueland, J. W. Lynn, G. L. Bychkov, S. N. Barilo, and Y. M. Mukovskii, Phys. Rev. B 78, 212301 (2008).

Tweaking the Spin Wave Dispersion and Suppressing the Incommensurate Phase in LiNiPO4 by Iron Substitution, Jiying Li, Thomas B. S. Jensen, Niels. H. Andersen, Jerel L. Zarestky, R. William McCallum, J.-H. Chung, Jeffrey W. Lynn, and David Vaknin, Phys. Rev. B 79, 174435 (2009).

Neutron Scattering Studies of LiCoPO4 and LiMnPO4, Wei Tian, Jiying Li, Haifeng Li, Jeffrey W. Lynn, Jerel L. Zarestky, and David Vaknin, J. Physics: Conf. Series 150, (2009).

Neutron Diffraction Study of the Mn Spin Correlations in Bi0.46Ca0.54Mn0.95Cr0.05O3, Chi-Hung Lee, Chun-Ming Wu, Daniel Hsu, Chin-Wei Wang, Chih-Jen Wang, Wen-Hsien Li, Chun-Chuen Yang, Jirong Sun, and Jeffrey W. Lynn, J. Phys. Soc. Japan 80, SB013 (2011).

Paramagnetic Spin Correlations in Colossal Magnetoresistive La0:7Ca0:3MnO3, Joel S. Helton, Matthew B. Stone, Dmitry A. Shulyatev, Yakov M. Mukovskii, and Jeffrey W. Lynn, Phys. Rev. B 85, 144401 (2012).

Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3, Y. J. Choi, N. Lee, P. A. Sharma, S. B. Kim, O.P. Vajk, J. W. Lynn, Y.S. Oh, and S-W. Cheong, Phys. Rev. Lett. 110, 157202 (2013).

Neutron Scattering Studies of Spin Dynamics in the Type-I Multiferroic Sr0.56Ba0.44MnO3, D. K. Pratt, J. W. Lynn, J. Mais, O. Chmaissem, Dennis E. Brown, Stanislaw Kolesnik, and B. Dabrowski, Phys Rev B 90, 140401(R) (2014).

Polaron-mediated Spin Correlations in Metallic and Insulating La1-xAxMnO3 (A=Ca, Sr, or Ba), Joel S. Helton, Daniel M. Pajerowski, Yiming Qiu, Yang Zhao, Dmitry A. Shulyatev, Yakov M. Mukovskii, Georgii L. Bychkov, Sergei N. Barilo, and Jeffrey W. Lynn, Phys Rev B 90, 214411 (2014).

Multiferroics, William Ratcliff and Jeffrey W. Lynn, Chapter 5 in Neutron Scattering - Magnetic and Quantum Phenomena, Felix Fernandez-Alonso and David L. Price, editors (Academic Press, London, 2015).  Review

Spin Dynamics and Two-dimensional Correlations in an FCC Antiferromagnetic Sr2YRuO6, S. M. Disseler, J. W. Lynn, R. F. Jardim, M. S. Torikachvili, and E. Granado, Phys. Rev. B 93, 140407(R) (2016).

Magnetic Structures and Dynamics of Multiferroic Systems Obtained with Neutron Scattering, W. D. Ratcliff, II, Jeffrey W. Lynn, Valery Kiryukhin, Prashant Jain, and Michael R. Fitzsimmons, Nature Partner Journals: Quantum Materials 1, 16003 (2016).  Review

Spin wave damping arising from phase coexistence below TC in colossal magnetoresistive La0:7Ca0:3MnO3, Joel S. Helton, Susumu K. Jones, Daniel Parshall, Matthew B. Stone, Dmitry A. Shulyatev, and Jeffrey W. Lynn, Phys. Rev. B 96, 104417 (2017).

 

 

    See Polaron Formation in Colossal Magnetoresistive Oxides

    See Multiferroics

 

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Frustrated, Low Dimensional, and Heavy Fermion Systems.  Quantum Critical Behavior

 

Non-Fermi Liquid Scaling in UPd1.5Cu3.5, M. C. Aronson, R. Osborn, R. A. Robinson, J. W. Lynn, R. Chau, C. L. Seaman, and M. B. Maple, Physica B 206-207, 108 (1995).

Non-Fermi Liquid Scaling of the Magnetic Response in UCu5-xCux (x = 1,1.5), M. C. Aronson, R. Osborn, R. A. Robinson, J. W. Lynn, R. Chau, C. L. Seaman, and M. B. Maple, Phys. Rev. Lett. 75, 725 (1995).

Low-energy Excitations and the Electronic Specific Heat of YbBiPt, R. A. Robinson, M. Kohgi, T. Osakabe, F. Trouw, J. W. Lynn, P. C. Canfield, J. D. Thompson, Z. Fisk, and W. P. Beyermann, Phys. Rev. Lett. 75, 1194 (1995).

Three-dimensional Magnetic Fluctuations in Heavy Fermion CeRhIn5, W. Bao, G. Aeppli, J. W. Lynn, P. G. Pagliuso, J. L. Sarrao, M. F. Hundley, J. D. Thompson, and Z. Fisk, Phys. Rev. B 65, R100505 (2002).

Magnetic Ordering and Spin Excitations in Quasi-1D Mn(dca)2(pyz) {dca=N(CN)2: pyz=pyrazine}, J. L. Manson, H. N. Bordallo, J. W. Lynn, Q. Huang, R. Feyerherm, A. Loose, L. Chapon, and D. N. Argyriou, Appl. Phys. A 74, S722 (2002).

Quantum Critical Scaling and Origin of Non-Fermi-Liquid Behavior in Sc1-xUxPd3, S. D. Wilson, P. Dai, D. T. Adroja, S-H. Lee, J-H. Chung, J. W. Lynn, N. P. Butch, and M. B. Maple, Phys. Rev. Lett. 94, 056402 (2005).

Inelastic Neutron Scattering Study of Crystal Field Levels in PrOs4As12, S. Chi, P. Dai, T. Barnes, H. J. Kang, J. W. Lynn, R. Bewley, F. Ye, M. B. Maple, Z. Henkie, and A. Pietraszko, Phys. Rev. B 77, 094428 (2008).

Quantum Phase Transition in the Itinerant Antiferromagnet (V0.9Ti0.1)2O3, Hiroaki Kadowaki, Kiyoichiro Motoya, Taku J. Sato, J. W. Lynn, J. A. Fernandez-Baca, and Jun Kikuchi, Phys. Rev. Lett. 101, 096406 (2008).

Spin Corrleations in the Geometrically Frustrated Pyrochlore Tb2Mo2O7, D. K. Singh, J. S. Helton, S. Chu, T. Han, C. Bonnoit, S. Chang, H. J. Kang, J. W. Lynn, and Y. S. Lee, Phys. Rev. B 78, 220405 (2008).

Inelastic Neutron Scattering Study of Crystal Field Levels in PrOs4As12, S. Chi, P. Dai, T. Barnes, H. J. Kang, J. W. Lynn, R. Bewley, F. Ye, M. B. Maple, Z. Henkie, and A. Pietraszko, Phys. Rev. B 77, 094428 (2008).

Magnetic Excitations in Triangular Lattice NaCrO2, D. Hsieh, D. Qian, R. F. Berger, R. J. Cava, J. W. Lynn, Q. Huang, and M. Z. Hasan, J. Phys. Chem. Solids. 69, 3174 (2008).

Observation of Magnetic Monopoles in Spin Ice, Hiroaki Kadowaki, Naohiro Doi, Yuji Aoki, Yoshikazu Tabata, Taku J. Sato, J. W. Lynn, K. Matsuhira, and Z. Hiroi,  J. Phys. Soc. Japan 78, 103706 (2009).

Coupling Between Field-induced Spin Fluctuations and Spin Density Wave in Intermetallic CeAg2Ge2, D. K. Singh, A. Thamizhavel, S. Chang, J.W. Lynn, D. Joshi, S.K. Dhar, and S. Chi, Phys. Rev. B 84, 052401 (2011).

Dzyaloshinskii-Moriya Interaction and Spin Reorientation Transition in the Frustrated Kagome Lattice Antiferromagnet, K. Matan, B. M. Bartlett, J. S. Helton, Y. Sikokenko, S. Matas, K. Prokes, Y. Chen, J. W. Lynn, D. Grohol, T. J. Sato, M. Tokunaga, D. G. Nocera, and Y. S. Lee,  Phys. Rev. B 83, 214406 (2011).

Quantum critical behavior in the heavy Fermion single crystal Ce(Ni0.935Pd0.065)2Ge2, C. H. Wang, J. M. Lawrence, A. D. Christianson, S. Chang, E. D. Bauer, K. Gofryk, F. Ronning, J. D. Thompson, K. J. McClellan, J. A. Rodriguez, and J. W. Lynn, J. Phys.: Conf. Series 273, 012018 (2011).

Molecular Spin-Orbit Excitations in the Jeff = 1/2 Frustrated Spinel GeCo2O4, K. Tomiyasu, M. K. Crawford, D. T. Adroja, P. Manuel, A. Tominaga, S. Hara, H. Sato, T. Watanabe, S. I. Ikeda, J. W. Lynn, K. Iwasa, and K. Yamada, Phys. Rev. B 84, 054405 (2011).

Coupling Between Field-induced Spin Fluctuations and Spin Density Wave in Intermetallic CeAg2Ge2, D. K. Singh, A. Thamizhavel, S. Chang, J.W. Lynn, D. Joshi, S.K. Dhar, and S. Chi, Phys. Rev. B 84, 052401 (2011).

Field-Induced Quantum Fluctuations in the Heavy Fermion Superconductor CeCu2Ge2, D.K. Singh, A. Thamizhavel, J.W. Lynn, C. Stock, J. Rodriguez-Rivera, and T. Herman, Scientific Reports 1, 117 (2011).

Common Origin of the two types of Magnetic Fluctuations in Iron Chalcogenides, Songxue Chi, J. A. Rodriguez, J. W. Lynn, Chenglin Zhang, D. Phelan, D. K. Singh, R. Paul, and Pengcheng Dai, Phys. Rev. B 84, 214407 (2011).

Quantum Spin Fluctuations in the Spin Liquid State of Tb2Ti2O7, Hiroshi Takatsu, Hiroaki Kadowaki, Taku J. Sato, Jeffrey W. Lynn, Yoshikazu Tabata, Terno Yamakaki, and Kazuyuki Matsuhira,  J. Phys. Cond. Matr. 24, 052201 (2012).

Two-Dimensional Magnetic Correlations and Partial Long-Range Order in Geometrically Frustrated Sr2YRuO6, E. Granado, J. W. Lynn, R. F. Jardim, and M. Torikachvili, Phys. Rev. Lett. 110, 017202 (2013).

Absence of a static in-plane magnetic moment in the "hidden-order" phase of URu2Si2, P. Das, R. E. Baumbach, E. D. Bauer, K. Huang, M. B. Maple, Y. Zhao, J. Helton, J. W. Lynn, and M. Janoschek, New J. Phys. 15, 053031(2013).

Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3, Y. J. Choi, N. Lee, P. A. Sharma, S. B. Kim, O.P. Vajk, J. W. Lynn, Y.S. Oh, and S-W. Cheong, Phys. Rev. Lett. 110, 157202 (2013).

Quantum Critical Fluctuations in the Heavy Fermion compound Ce(Ni0.935Pd0.065)2Ge2, C. H. Wang, L. Poudel, A. E. Taylor. J. M. Lawrence, A. D. Christianson, S. Chang, J. A. Rodriguez-Rivera, J. W. Lynn, A. A. Podlesnyak, G. Ehlers, R. E. Baumbach,E. D. Bauer, K. Gofryk, F. Ronning, K. J. McClellan, and J. D. Thompson, J. Phys. Cond. Matt. 27, 015602 (2015).

Neutron, Electron, and X-ray Scattering Investigation of Cr1-xVx near Quantum Criticality, D. A. Sokolov, M. C. Aronson, L. Wu, Y. Zhu, C. Nelson, J. F. Mansfield, K. Sun, R. Erwin, J. W. Lynn, M. Lumsden, and S. E. Nagler, Phys Rev B 90, 035139 (2014).

Spin Order by Frustration in Triangular Lattice NaCrO2 : A Neutron Scattering Study, D. Hsieh, D. Qian, R.F. Berger, B. Ueland, P. Schiffer, R.J. Cava, J.W. Lynn, Q. Huang, and M.Z. Hasan,. (submitted).

Symmetry and Correlations Underlying Hidden Order in URu2Si2, Nicholas P. Butch, Michael E. Manley, Jason R. Jeffries, Marc Janoschek, Kevin Huang, M. Brian Maple, Ayman H. Said, Bogdan M. Leu, and Jeffrey W. Lynn, Phys Rev B 91, 035128 (2015).

A Neutron Scattering Study of the H-T Phase Diagram of the Bond Frustrated Mott Insulator ZnCr2S4, D. Hsieh, Y. W. Li, S. Watauchi, Chang Liu, Q. Huang, R. J. Cava, J. W. Lynn, and M. Z. Hasan (submitted).

Chemical Pressure Tuning of URu2Si2 via Isoelectronic Substitution of Ru with Fe, Pinaki Das, N. Kanchanavatee, J. S. Helton, K. Huang, R. E. Baumbach, E. D. Bauer, B. D. White, V. W. Burnett, M. B. Maple, J.W. Lynn, and M. Janoschek, Phys. Rev. B 91, 085122 (2015).

Magnetic structure and exchange interactions in quasi-1D MnCl2(urea)2, Jamie L. Manson, Qing-zhen Huang, Craig M. Brown, Jeffrey W. Lynn, Matthew B. Stone, John Singleton, and Fan Xiao, Inorg. Chem. (2015).

Quantum Critical Fluctuations in the Heavy Fermion compound Ce(Ni0.935Pd0.065)2Ge2, C. H. Wang, L. Poudel, A. E. Taylor. J. M. Lawrence, A. D. Christianson, S. Chang, J. A. Rodriguez-Rivera, J. W. Lynn, A. A. Podlesnyak, G. Ehlers, R. E. Baumbach,E. D. Bauer, K. Gofryk, F. Ronning, K. J. McClellan, and J. D. Thompson, J. Phys. Cond. Matt. 27, 015602 (2015).

Symmetry and Correlations Underlying Hidden Order in URu2Si2, Nicholas P. Butch, Michael E. Manley, Jason R. Jeffries, Marc Janoschek, Kevin Huang, M. Brian Maple, Ayman H. Said, Bogdan M. Leu, and Jeffrey W. Lynn, Phys. Rev. B 91, 035128 (2015).

Spin Dynamics and Two-dimensional Correlations in an FCC Antiferromagnetic Sr2YRuO6, S. M. Disseler, J. W. Lynn, R. F. Jardim, M. S. Torikachvili, and E. Granado, Phys. Rev. B 93, 140407(R) (2016).

Distinct magnetic spectra in the hidden order and antiferromagnetic phases in URu2-xFexSi2, Nicholas P. Butch, Sheng Ran, Inho Jeon, Noravee Kanchanavatee, Kevin Huang, Alexander Breindel, M. Brian Maple, Ryan L. Stillwell, Yang Zhao, Leland Harriger, and Jeffrey W. Lynn, Phys. Rev. B 94, 201102 (2016).

Amplitude mode in a classical, two-dimensional triangular antiferromagnet, Rebecca L. Dally, Yang Zhao, Zhijun Xu, Robin Chisnell, Matthew Stone, Jeffrey W. Lynn, Leon Balents, and Stephen D. Wilson, Nature Communications 9, 2188 (2018).

Thermal evolution of static quasi-1D spin correlations within the anisotropic triangular lattice of a-NaMnO2, Rebecca L. Dally, Robin Chisnell, Leland Harriger, Yaohua Liu, Jeffrey W. Lynn, and Stephen D. Wilson,  Phys. Rev. B 98, 144444 (2018).

 

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Spin Dynamics in Superconductors

 

Magnetic Fluctuations and Two-Dimensional Ordering in ErBa2Cu3O7, J. W. Lynn, W.-H. Li, Q. Li, H. C. Ku, H. D. Yang and R. N. Shelton, Phys. Rev. B36, 2374 (RC) (1987).

Dispersion of the Magnetic Excitations of the Pr ions in Pr2CuO4, I. W. Sumarlin, J. W. Lynn, T. Chattopadhyay, S. N. Barilo, and D. I. Zhigunov, Physica C 219, 195 (1994).

Magnetic Structure and Spin Dynamics of the Pr and Cu in Pr2CuO4, I. W. Sumarlin, J. W. Lynn, T. Chattopadhyay, S. N. Barilo, D. I. Zhigunov, and J. L. Peng, Phys. Rev. B 51, 5824 (1995).

Spin Dynamics of Er3+ in ErBa2Cu3O7, S. Skanthakumar, J. W. Lynn, and F. Dogan, J. Appl. Phys. 81, 4934 (1997).

Magnetic Excitations of RNi2B2C Single Crystals in R=Tb and Ho, A. Kreyssig, O. Stockert, D. Reznik, F. M. Woodward, J. W. Lynn, H. Bitterlich, D. Souptel, G. Behr, and M. Loewenhaupt, Physica C 408-410, 100 (2004).

Structural and Magnetic Properties of the Single-layer Manganese Oxide La1-xSr1+xMnO4, S. Larochelle, A. Metha, L. Lu, P. K. Mang, O. P. Vajk, N. Kaneko, J. W. Lynn, L. Zhou, and M. Greven, Phys. Rev. B 71, 024435 (2005).

Neutron Scattering Study of La1.9Ca1.1Cu2O6+d and La1.85Sr0.15CaCu2O6+d, M. Hücker, Y.-J. Kim, G. D. Gu, J. M. Tranquada, B. D. Gaulin, and J. W. Lynn, Phys. Rev. B 71, 094510 (2005).

Resonance in the Electron-doped high TC Superconductor Pr0.88LaCe0.12CuO4-y, S. D. Wilson, P. Dai, S. Li, S. Chi, H. J. Kang, and J. W. Lynn, Nature 442, 59 (2006).

Quantum Spin Correlations through the Superconducting-to-normal Phase Transition in Electron-doped Superconducting Pr0.88LaCe0.12CuO4-δ, Stephen D. Wilson, Shiliang Li, Jun Zhao, Gang Mu, Hai-hu Wen, Jeffrey W. Lynn, Paul G. Freeman, Louis-Pierre Regnault, Klaus Habicht, Pengcheng Dai, Proceedings of the National Academy of Sciences 104, 15259 (2007).

Impact of Oxygen Annealing on the Heat Capacity and Magnetic Resonance of Superconducting Pr0.88LaCe0.12CuO4-y, S. Li, S. Chi, J. Zhao, H.-H. Wen, M. B. Stone, J. W. Lynn, and P. Dai, Phys. Rev. B 78, 014520 (2008).

Neutron Scattering Study of the Oxypnictide Superconductor LaO0.87F0.13FeAs, Y. Qiu, M. Kofu,  Wei Bao, S.-H. Lee, Q. Huang, T. Yildirim, J. R. D. Copley, J. W. Lynn, T. Wu, G. Wu, and X. H. Chen, Phys. Rev. B 78, 052508 (2008).

The crystalline electric field as a probe for long range antiferromagnetic order and superconductivity in CeFeAsO1−xFx, S. Chi, D. T. Adroja, T. Guidi, R. Bewley, Shliang Li, Jun Zhao, J. W. Lynn, C. M. Brown, Y. Qiu, G. F. Chen, J. L. Lou, N. L. Wang, and Pengcheng Dai, Phys. Rev. Lett. 101, 217002 (2008).

Neutron Studies of the Iron-based Family of High Tc Magnetic Superconductors, J. W. Lynn, Mater. Res. Soc. Symp. Proc. 1148, PP02-05 (2008).

Low energy spin waves and magnetic interactions in SrFe2As2, J. Zhao, D.-X. Yao, S. Li, T. Hong, Y. Chen, S. Chang, W. Ratcliff II, J. W. Lynn, H. A. Mook, G. F. Chen, J. L. Luo, N. L. Wang, E. W. Carlson, J. Hu, and P. Dai, Phys. Rev. Lett. 101, 167203 (2008).

Neutron Studies of the Iron-based Family of High TC Magnetic Superconductors, Jeffrey W. Lynn and Pengcheng Dai, Physica C 469. 469 (2009).

Spin Gap and Magnetic Resonance in Superconducting BaFe1.9Ni0.1As, S. Li, Y. Chen, S. Chang, J. W. Lynn, L. Li, Y. Luo, G. Cao, Z. Xu, and P. Dai, Phys. Rev. B 79, 174527 (2009).

Neutron Studies of the Iron-based Family of High TC Magnetic Superconductors, Jeffrey W. Lynn and Pengcheng Dai, Physica C 469. 469 (2009).

Plummer, Phys. Rev. B79, 085105 (2009).

Spin Gap and Magnetic Resonance in Superconducting BaFe1.9Ni0.1As, S. Li, Y. Chen, S. Chang, J. W. Lynn, L. Li, Y. Luo, G. Cao, Z. Xu, and P. Dai, Phys. Rev. B 79, 174527 (2009).

Lattice distortion and Magnetic Quantum Phase Transition in CeFeAs1-xPxO, C. de la Cruz, W. Z. Hu, S. Li, Q. Huang, J. W. Lynn, M. A. Green, G. F. Chen, N. L. Wang, H. A. Mook, Q. Si, and P. Dai, Phys. Rev. Lett. 104, 017204 (2010).

Electron-doping Evolution of the Low-energy Spin Excitations in the Iron Arsenide BaFe2-xNixAs2 Superconductors, Miaoyin Wang, Huiqian Luo, Jun Zhao, Chenglin Zhang, Meng Wang, Karol J. Marty, Songxue Chi, Jeffrey W. Lynn, Astrid Schneidewind, Shiliang Li, and Pengcheng Dai, Phys. Rev. B 81, 174524 (2010).

Doping Dependence of Spin Dynamics in Electron-Doped Ba(Fe1−xCox)2As2, K. Matan, S. Ibuka, R. Morinaga, S. X. Chi, J. W. Lynn, A. D. Christianson, M. D. Lumsden, and T. J. Sato, Phys. Rev. B 82, 054515 (2010).

Antiferromagnetic Critical Fluctuations in BaFe2As2, Stephen D. Wilson, Z. Yamani, C. R. Rotundu, B. Freelon, P. N. Valdivia, E. Bourret-Courchesne, J. W. Lynn, Songxue Chi, Tao Hong, and R. J. Birgeneau, Phys. Rev. B 82, 144502 (2010). 

Magnetic Field Effect on the Static Antiferromagnetic Order and Spin Excitations in the Underdoped Iron Arsenide Superconductor BaFe1.92Ni0.08As2, M Wang, H. Luo, M. Wang, S. Chi, J. A. Rodriguez-Rivera, D. Singh, S. Chang, J. W. Lynn, and P. Dai, Phys. Rev. B 83, 094516 (2011).

Antiferromagnetic Spin Excitations in Single Crystals of Nonsuperconducting Li1−xFeAs, Meng Wang, X. C. Wang, D. L. Abernathy, L. W. Harriger, H. Q. Luo, Yang Zhao, J. W. Lynn, Q. Q. Liu, C. Q. Jin, Chen Fang, Jiangping Hu, and Pengcheng Dai, Phys. Rev. B 83, 220515(R) (2011).

Neutron Scattering Studies of Spin Excitations in Hole-doped Ba0.67K0.33Fe2As2 Superconductor, Chenglin Zhang, Meng Wang, Huiqian Luo, Miaoyin Wang, Mengshu Liu, Jun Zhao, D. L. Abernathy, T. A. Maier, Karol Marty, M. D. Lumsden, Songxue Chi, Sung Chang, Jose A. Rodriguez-Rivera, J. W. Lynn, Tao Xiang, Jiangping Hu, Pengcheng Dai,  Scientific Reports 1, 115 (2011).

Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with the Superconducting State of BaFe2-xNixAs2, Huiqian Luo, Rui Zhang, Mark Laver, Meng Wang, Xingye Lu, Miaoyin Wang, Yanchao Chen, Shiliang Li, Zahra Yamani, Sung Chang, Jeffrey W. Lynn, and Pengcheng Dai, Phys. Rev. Lett. 108, 247002 (2012).

Magnetic Neutron Diffraction Study of Ba(Fe1-xCox)2As2 Critical Exponents through the Tricritical Doping, D. M. Pajerowski, C. R. Rotundu, J. W. Lynn, and R. J. Birgeneau, Phys. Rev. B 87, 134507 (2013).

Distinguishing s± and s++ electron pairing symmetries by neutron spin resonance in superconducting NaFe0.935Co0.045As, Chenglin Zhang, H.-F. Li, Yixi Su, Guotai Tan, Yu Song, Tucker Netherton, Caleb Redding, Scott V. Carr, Oleg Sobolev, Astrid Schneidewind, Enrico Faulhaber, L. W. Harriger, Shiliang Li, Xingye Lu, Daoxin Yao, Tanmoy Das, A. V. Balatsky, Th. Brückel, J. W. Lynn, and Pengcheng Dai, Phys. Rev. B 88, 064504 (2013).

Origin of the Charge Gap in LaMnPO, D.E. McNally, J. W. Simonson, K. W. Post, Z. P. Yin, M. Pezzoli, G. J. Smith, V. Leyva, C. Marques, L. DeBeer-Schmidt, A. I. Kolesnikov, Y. Zhao, J.W. Lynn, D. N. Basov, G. Kotliar, and M. C. Aronson, Phys Rev B 90, 180403(R) (2014).

Neutron-scattering Measurements of the Spin Excitations in LaFeAsO and Ba(Fe0.953Co0.047)2As2:  Evidence for a Sharp Enhancement of Spin fluctuations by Nematic Order, Qiang Zhang, Rafael M. Fernandes, Jagat Lamsal, Jiaqiang Yan, Songxue Chi, Gregory S. Tucker, Daniel K. Pratt, Jeffrey W. Lynn, R. W. McCallum, Paul C. Canfield, Thomas A. Lograsso, Alan Goldman, David Vaknin, and Robert J. McQueeney, Phys. Rev. Lett. 114, 057001 (2015).

Neutron Spin Resonance as a Probe of Superconducting Gap Anisotropy in detwinned Electron Underdoped NaFe0.985Co0.015As, Chenglin Zhang, J. T. Park, Xingye Lu, Rong Yu, Yu Li, Wenliang Zhang, Yang Zhao, J. W. Lynn, Qimiao Si, and Pengcheng Dai, Phys. Rev. B 91, 104520 (2015).

Spin Waves and Spatially Anisotropic Exchange Interactions in the S = 2 Stripe Antiferromagnet Rb0:8Fe1.5S2, Meng Wang, P. Valdivia, J. X. Chen, W. L. Zhang, Ming Yi, R. A. Ewings, T. G. Perring, Yang Zhao, L. W. Harriger, J. W. Lynn, E. Bourret-Courchesne, Pengcheng Dai, D. H. Lee, D. X. Yao, and R. J. Birgeneau, Phys. Rev. B 92, 014109(R) (2015).

Transition from Sign-Reversed to Sign-Preserved Cooper-Pairing Symmetry in Sulfur-Doped Iron Selenide Superconductors, Qisi Wang, J. T. Park, Yu Feng, Yao Shen, Yiqing Hao, Bingying Pan, J. W. Lynn, A. Ivanov, Songxue Chi, M. Matsuda, Huibo Cao, R. J. Birgeneau, D. V. Efremov, and Jun Zhao, Phys. Rev. Lett. 116, 197004 (2016).

Suppression of Antiferromagnetic Spin Fluctuations in Superconducting Cr0.8Ru0.2, M. Ramazanoglu, B. G. Ueland, D. K. Pratt, L. W. Harriger, J. W. Lynn, G. Ehlers, G. E. Granroth, S. L. Bud'ko, P. C. Canfield, D. Schlagel, A. I. Goldman, T. A. Lograsso, and R. J. McQueeney, Phys. Rev. B 98, 13451 (2018).

        See Spin Dynamics in Electron-doped Cuprate Superconductors

    and Magnetic Order in Superconductors

 

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