Elucidaion on the effects of hydrostatic pressure on multiferroic, HoMn2O5

ORAL

Abstract

HoMn$_{2}$O$_{5}$ has been the subject of intense study as a mutltiferroic material in which both ferroelectricy and magnetic ordering coexist. Earlier work has shown that the ferrolelectric polarization and the dielectric constant are strongly effected by the application of a magnetic field. At low temperatures, as the system's magnetic structure lowers from a commensurate to an incommensurate magnetic phase, ferrolectricity is suppressed and the system becomes paralelectric. It has recently been shown that the applications of hydrostatic pressures of 6 Kbar can stabilize the ferroelectric phase of HoMn$_{2}$O$_{5}$ at low temperatures. During this talk, we discuss the results of neutron diffraction experiments performed on the BT1 powder diffractometer at the NCNR that correlate this preservation of ferroelectricty with changes in the magnetic structure.

–

Authors

  • William Ratcliff

    National Institute of Standards and Technology, NIST Center for Neutron Research

  • C.R. dela Cruz

    TcSUH,Dept. of Physics, Univ. of Houston, Texas Center for Superconductivity, University of Houston

  • B. Lorenz

    University of Houston/TCSUH, Texas Center for Superconductivity, University of Houston

  • Q. Huang

    NIST Center for Neutron Research, NIST Center for Neutron Research, Gaithersburg, Maryland 20899

  • S. Park

    Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, Department of Physics, Rutgers University, Rutgers University

  • SangWook Cheong

    Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, Physics Department, Rutgers University, Rutgers University, Dept. of Physics and Astronomy, Rutgers University, Rutgers Center for Emergent Materials, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, Department of Physics, Rutgers, Rutgers Univ.