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College Park, Maryland      June 6 - 10 , 2004

TP48: Low Dimensional Magnetism in the Molecular Magnet Cu(pz)2(ClO4)2

F.M. Woodward (NIST Center for Neutron Research), C.P. Landee (Clark University Physics Department, Worcester MA, 01610), M.M. Turnbull (Clark University Chemistry Department, Worcester MA, 01610)

Cu(pz)2(ClO4)2 belongs to a family of compounds composed of magnetic Cu2+ ions linked by pyrazine molecular units forming Cu-pz layered materials. Magnetic susceptibility, isothermal magnetization, electron spin resonance, and neutron scattering data indicate that the molecular magnet, Cu(pz)2(ClO4)2, exhibits a low dimensional antiferromagnetic character, conforming to the two dimensional Heisenberg antiferromagnetic model, with a moderate exchange strength (J = -18 K). The results of an investigation of Cu(pz)2(ClO4)2 via neutron diffraction shows characteristics similar to other two dimensional systems. Analysis of neutron diffraction data result in a model of the spins in the 3D order state.

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