Direct observation of the ferrimagnetic coupling of A-site Cu and B-site Fe spins in charge-disproportionated CaCu3Fe4O12

被引：44

作者：

Mizumaki, M. ^{[1
,2
]}

Chen, W. T. ^{[3
]}

Saito, T. ^{[2
,3
]}

Yamada, I. ^{[3
]}

Attfield, J. Paul ^{[4
,5
]}

Shimakawa, Y. ^{[2
,3
]}

机构：

[1] SPring 8, Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[2] Japan Sci & Technol Agcy, Chiyoda Ku, Tokyo 1020075, Japan

[3] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[4] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

[5] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

RAY CIRCULAR-DICHROISM; PEROVSKITE; MAGNETORESISTANCE;

D O I：

10.1103/PhysRevB.84.094418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic coupling between Fe and Cu moments in the charge-disproportionated CaCu3Fe4O12 is studied by neutron powder diffraction, x-ray absorption, and magnetic circular dichroism measurements. The magnetic moments of the B-site Fe are coupled antiferromagnetically with those of the A'-site Cu, and the Fe3+ and Fe5+ spins at the B site align ferromagnetically. The orbital contribution of the magnetic moment for Fe is significant and appears to stabilize the ferrimagnetic structure of charge-disproportionated CaCu3Fe4O12.

引用

页数：4

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