Superexchange interaction in orbitally fluctuating RVO3

被引：51
|
作者：
Zhou, J.-S. [1 ]
Goodenough, J. B.
Yan, J.-Q.
Ren, Y.
机构：
[1] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA
[2] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA
[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.99.156401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Changes in pressure and magnetic field in the orbital and magnetic ordering temperatures of RVO3 perovskites are reported; they reveal a competition between two magnetic orbitally ordered phases that have opposite preferences for the e-orbital component in the localized T-3(1g) ground state of the V3+ ion. This competition is shown to be biased by the VO6/2 site distortion intrinsic to the orthorhombic structure. A remarkable enhancement of T-N with pressure is found where the competition leads to enhanced orbital critical fluctuations.
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页数：4
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