Ferromagnetism in the Mott insulator Ba2NaOsO6

被引：155

作者：

Erickson, A. S. ^{[1
]}

Misra, S.

Miller, G. J.

Gupta, R. R.

Schlesinger, Z.

Harrison, W. A.

Kim, J. M.

Fisher, I. R.

机构：

[1] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[2] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[3] Iowa State Univ, Dept Chem, Ames, IA 50011 USA

[4] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[5] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.99.016404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Results are presented of single crystal structural, thermodynamic, and reflectivity measurements of the double-perovskite Ba2NaOsO6. These characterize the material as a 5d(1) ferromagnetic Mott insulator with an ordered moment of similar to 0.2 mu(B) per formula unit and T-C=6.8(3) K. The magnetic entropy associated with this phase transition is close to Rln2, indicating that the quartet ground state anticipated from consideration of the crystal structure is split, consistent with a scenario in which the ferromagnetism is associated with orbital ordering.

引用

页数：4

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