TY - JOUR
T1 - Mechanism of exchange striction of ferroelectricity in multiferroic orthorhombic HoMnO3 single crystals
AU - Lee, N.
AU - Choi, Y. J.
AU - Ramazanoglu, M.
AU - Ratcliff, W.
AU - Kiryukhin, V.
AU - Cheong, S. W.
PY - 2011/7/1
Y1 - 2011/7/1
N2 - E-type perovskite magnet HoMnO3 is considered to be a prototype Mn-Mn exchange-striction driven multiferroic. We have grown orthorhombic HoMnO3 single crystals and studied the directional dependence of their electric polarization P. The direction of P is not along the crystallographic a axis, as predicted, but along the c axis. The magnetic state is incommensurate. The direction P along the c axis is primarily induced by Ho-Mn exchange striction, and Mn-Mn striction in the incommensurate spin state leads to an antiferroelectric order along the a axis. We predict the rotation of P with temperature in commensurate E-type RMnO3 (R denotes magnetic rare earth).
AB - E-type perovskite magnet HoMnO3 is considered to be a prototype Mn-Mn exchange-striction driven multiferroic. We have grown orthorhombic HoMnO3 single crystals and studied the directional dependence of their electric polarization P. The direction of P is not along the crystallographic a axis, as predicted, but along the c axis. The magnetic state is incommensurate. The direction P along the c axis is primarily induced by Ho-Mn exchange striction, and Mn-Mn striction in the incommensurate spin state leads to an antiferroelectric order along the a axis. We predict the rotation of P with temperature in commensurate E-type RMnO3 (R denotes magnetic rare earth).
UR - http://www.scopus.com/inward/record.url?scp=79961189768&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79961189768&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.020101
DO - 10.1103/PhysRevB.84.020101
M3 - Article
AN - SCOPUS:79961189768
VL - 84
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 2
M1 - 020101
ER -