Title: Thermally or Magnetically Induced Polarization Reversal in the Multiferroic CoCr(2)O(4)
Authors: Choi, Y. J.
Okamoto, J.
Huang, D. J.
Chao, K. S.
Lin, H. J.
Chen, C. T.
van Veenendaal, M.
Kaplan, T. A.
Cheong, S-W.
Department of Electrophysics
Issue Date: 13-Feb-2009
Abstract: We report the unexpected evolution, with thermal and magnetic-field (H) variations, of the interrelation between the polarization P, magnetization M, and spiral wave vector Q in CoCr(2)O(4), which has a ferrimagnetic conical-spiral magnetic order. For example, P suddenly jumps and changes its sign at the magnetic lock-in transition (T(L)) with thermal variation, or with isothermal variation of H (without changing its direction) at T(L), which surprisingly occurs without change in spiral handedness (i.e., the sign of Q). The presence of multiple spiral sublattices may be behind this unusual behavior.
URI: http://dx.doi.org/10.1103/PhysRevLett.102.067601
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.102.067601
Volume: 102
Issue: 6
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Appears in Collections:Articles