文献详情
Weak exchange striction between the 4f and 3d ions in the multiferroic GdMn2O5
文献类型：期刊
通讯作者：Ye, F (reprint author), Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA.
期刊名称：PHYSICAL REVIEW B影响因子和分区
年：2019
卷：99
期：9
ISSN：2469-9950
所属部门：物理学系
摘要：We used single-crystal neutron diffraction to investigate the magnetic structures of the multiferroic GdMn2O5. The system undergoes a first-order incommensurate to commensurate magnetic transition below 33 K, accompanied by the appearance of electric polarization P. Upon cooling, P increases smoothly while the magnetic order shows an abrupt enhancement in intensity below 20 K owing to the large increase of the rare-earth Gd moment. The contrasting temperature evolution of the magnetic order and ...More
We used single-crystal neutron diffraction to investigate the magnetic structures of the multiferroic GdMn2O5. The system undergoes a first-order incommensurate to commensurate magnetic transition below 33 K, accompanied by the appearance of electric polarization P. Upon cooling, P increases smoothly while the magnetic order shows an abrupt enhancement in intensity below 20 K owing to the large increase of the rare-earth Gd moment. The contrasting temperature evolution of the magnetic order and polarization indicates the polarization is mainly driven by the exchange striction between the magnetic Mn ions. The incommensurate phase in the intermediate temperature range has a cycloidal modulation along the c axis, with spin configuration projected in the ab plane similar to the commensurate phase. The lack of observable bulk polarization suggests the exchange striction is not the dominant mechanism for the polarization in the incommensurate phase. ...Hide

DOI：10.1103/PhysRevB.99.094429
百度学术：Weak exchange striction between the 4f and 3d ions in the multiferroic GdMn2O5
语言：外文
人气指数：2
浏览次数：2
基金：U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC05-00OR22725]; Scientific User Facilities Division, Basic Energy Sciences, U.S. Department of Energy (DOE); China Scholarship CouncilChina Scholarship Council; DOEUnited States Department of Energy (DOE) [DE-FG02-07ER46382]; U.S. Air Force Office of Scientific ResearchUnited States Department of DefenseAir Force Office of Scientific Research (AFOSR) [FA9550-15-1-0236]; T. L. L. Temple Foundation; John J. and Rebecca Moores Endowment; State of Texas through the Texas Center for Superconductivity at the University of Houston
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