Magnetic coupling between A′ and B sites in the A-site-ordered perovskite BiCu3Mn4O12

被引：18

作者：

Saito, Takashi ^{[1
]}

Chen, Wei-tin ^{[1
,2
,3
]}

Mizumaki, Masaichiro ^{[4
]}

Attfield, J. Paul ^{[2
,3
]}

Shimakawa, Yuichi ^{[1
]}

机构：

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

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

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

[4] Japan Synchrotron Radiat Res Inst, Saya, Hyogo 6795198, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

CIRCULAR-DICHROISM; MAGNETORESISTANCE;

D O I：

10.1103/PhysRevB.82.024426

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ionic states of Cu and Mn ions and the magnetic structure in an A-site-ordered perovskite BiCu3Mn4O12 were investigated by powder neutron diffraction and soft x-ray absorption and magnetic circular dichroism spectroscopy experiments. A substitution by Mn3+ was found at the square-planar A' Cu2+ site, leading to a composition Bi(Cu0.82+Mn0.23+)(3)Mn43.6+O12. This compound is a ferrimagnet with a collinear spin configuration below T-C=350 K, and the magnetic structure is stabilized by a strong ferromagnetic coupling between the A' and B site Mn ions and an antiferromagnetic coupling between Cu and Mn ions, leading to a near zero net moment at the A' site.

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页数：5

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