College Park, Maryland June 6 - 10 , 2004
M3-C2 (2:00 PM): Elucidation of a Magnetoelectric Switch
W. Ratcliff II, S.-H Lee (NIST Center for Neutron Research), V. Kiryukhin (Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA), R. Erwin (NIST Center for Neutron Research), N. Hur, S.Y. Park, S.-W. Cheong (Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA)
It has been recently found that a Mn based magnetoelectric material develops a spontaneous electric polarization below the Neel ordering temperature. Furthermore, this spontaneous polarization can be switched through the application of a magnetic field. Several anomalies were also observed in the dielectric constant. We have performed neutron diffraction measurements on a single crystal, and have found that anomalies in the dielectric constant and the polarization are correlated with magnetic transitions induced by field or temperature. During this talk, I will present the magnetic phase diagram of this system and show how it corresponds to the spontaneous polarization and anomalies in the dielectric constant.
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