Soft X-ray magnetic circular dichroism study of the ferromagnetic spinel-type Cr chalcogenides

被引：10

作者：

Kimura, A

Matsuno, J

Okabayashi, J

Fujimori, A

Shishidou, T

Kulatov, E

Kanomata, T

机构：

[1] Hiroshima Univ, Grad Sch Sci, Dept Phys Sci, Higashihiroshima 7398526, Japan

[2] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[3] Univ Tokyo, Dept Complexing Sci & Engn, Bunkyo Ku, Tokyo 1130033, Japan

[4] Hiroshima Univ, ADSM, Dept Quantum Matter, Higashihiroshima 7398526, Japan

[5] Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia

[6] Tohoku Gakuin Univ, Fac Engn, Dept Appl Phys, Tagajo, Miyagi 9858537, Japan

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2001年 / 114卷

关键词：

spinel type Cr chalcogenides; magnetic circular dichroism (MCD); soft X-ray absorption spectroscopy (XAS); multiplet calculation; linear-muffin-tin orbital (LMTO) band structure calculation;

D O I：

10.1016/S0368-2048(00)00332-7

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We have observed magnetic circular dichroism (MCD) in the soft X-ray absorption spectra of the semiconducting ferromagnet CdCr2Se4 and the metallic ferromagnets CuCr2S4 and CuCr2Se4. The Cr 2p X-ray absorption and MCD spectra show that the d-electron occupancies of the Cr atom in the Cu-based Cr sulfide and selenide are not much different from that in the CdCr2Se4 in spite of the different formal valencies, Cr3.5+ and Cr3+, respectively. The observed Cu 2p MCD spectra show the existence of small magnetic moments on the Cu sites which are aligned antiparallel to the Cr 3d moment in CuCr2S4 and CuCr2Se4, consistent with band-structure calculation. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：789 / 793

页数：5

共 12 条

[1] Electronic structure of early 3d-transition-metal oxides by analysis of the 2p core-level photoemission spectra [J].