Magnetic Phase Diagram of the Giant Magnetoelectric DyMn2O5
William Ratcliff II, NCNR
It has been recently found that DyMn2O5 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 of such a material, 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.
Back to Seminar Home Page
Last modified 29-December-2004 by website owner: NCNR (attn: Yun Liu)