X-ray absorption and x-ray magnetic dichroism study on Ca3CoRhO6 and Ca3FeRhO6

被引：100

作者：

Burnus, T. ^{[1
]}

Hu, Z. ^{[1
]}

Wu, Hua ^{[1
]}

Cezar, J. C. ^{[2
]}

Niitaka, S. ^{[3
,4
]}

Takagi, H. ^{[3
,4
,5
]}

Chang, C. F. ^{[1
]}

Brookes, N. B. ^{[2
]}

Lin, H. -J. ^{[6
]}

Jang, L. Y. ^{[6
]}

Tanaka, A. ^{[7
]}

Liang, K. S. ^{[6
]}

Chen, C. T. ^{[6
]}

Tjeng, L. H. ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3150198, Japan

[4] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[5] Univ Tokyo, Dept Adv Mat Sci, Chiba 2778581, Japan

[6] Natl Synchrotron Radiat Res Ctr, Hsinchu 30077, Taiwan

[7] Hiroshima Univ, Dept Quantum Matter, ADSM, Higashihiroshima 7398530, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.77.205111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By using x-ray absorption spectroscopy at the Rh L-2,L-3, Co L-2,L-3, and Fe L-2,L-3 edges, we find a valence state of Co2+/Rh4+ in Ca3CoRhO6 and of Fe3+/Rh3+ in Ca3FeRhO6. X-ray magnetic circular dichroism spectroscopy at the Co L-2,L-3 edge of Ca3CoRhO6 reveals a giant orbital moment of about 1.7 mu(B), which can be attributed to the occupation of the minority-spin d(0)d(2) orbital state of the high-spin Co2+ (3d(7)) ions in trigonal prismatic coordination. This active role of the spin-orbit coupling explains the strong magnetocrystalline anisotropy and Ising-type magnetism of Ca3CoRhO6.

引用

页数：6

共 40 条

[1] Magnetic properties of the one-dimensional Ca3Co2O6 [J].