Spin-orbital ordering and mesoscopic phase separation in the double perovskite Ca2FeReO6 -: art. no. 064409

被引：45

作者：

Granado, E

Huang, Q

Lynn, JW

Gopalakrishnan, J

Greene, RL

Ramesha, K

机构：

[1] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[2] Univ Maryland, Ctr Superconduct Res, College Pk, MD 20742 USA

[3] Univ Maryland, Mat Engn Program, College Pk, MD 20742 USA

[4] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.66.064409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron powder diffraction measurements on Ca2FeReO6 reveal that this double perovskite orders ferrimagnetically and shows anomalous lattice parameter behavior below T-C=521 K. Below similar to300 K and similar to160 K we observe that the high-T monoclinic crystal structure separates into two and three monoclinic phases, respectively. A magnetic field suppresses the additional phases at low T in favor of the highest-T phase. These manifestations of the orbital degree of freedom of Re 5d electrons indicate that these electrons are strongly correlated and the title compound is a Mott insulator, with competing spin-orbitally ordered states.

引用

页码：644091 / 644095

页数：5

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