@article{70c9767902ff4389862fa091f69b6a4a,
title = "Mechanism of exchange striction of ferroelectricity in multiferroic orthorhombic HoMnO3 single crystals",
abstract = "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).",
author = "N. Lee and Choi, {Y. J.} and M. Ramazanoglu and W. Ratcliff and V. Kiryukhin and Cheong, {S. W.}",
year = "2011",
month = jul,
day = "1",
doi = "10.1103/PhysRevB.84.020101",
language = "English",
volume = "84",
journal = "Physical Review B - Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "American Physical Society",
number = "2",
}