Theory of magnetic circular X-ray dichroism at the Fe K-edge in rare-earth iron garnets

被引：7

作者：

Harada, I ^{[1
]}

Suzuki, T ^{[1
]}

Kotani, A ^{[1
]}

机构：

[1] UNIV TOKYO, INST SOLID STATE PHYS, MINATO KU, TOKYO 106, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1996年 / 65卷 / 09期

关键词：

MCXD; rare-earth iron garnet; electric-dipole transition; hybridization;

D O I：

10.1143/JPSJ.65.3016

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A mechanism is proposed for the magnetic circular X-ray dichroism (MCXD) at the pre-peak of the Fe K-edge in rare-earth iron garnets. It is found based on a cluster model that, at the pre-peak, the hybridization between the 3d state and the 4p state of an Fe ion on the tetrahedral site through the ligand 2p states is responsible for the weak electric-dipole absorption while the combined effect of the spin-orbit interaction and the spin polarization in the 3d states give rise to its MCXD. In addition, the configuration interaction is shown to be important in explaining the asymmetric dispersion-type MCXD spectra observed. The effects of the core hole as well as of the band character of the 4p states are discussed briefly in connection is with MCXD observed in the main X-edge region.

引用

页码：3016 / 3020

页数：5

共 9 条

[1] ELECTRONIC-STRUCTURE OF 3D-TRANSITION-METAL COMPOUNDS BY ANALYSIS OF THE 2P CORE-LEVEL PHOTOEMISSION SPECTRA [J].

BOCQUET, AE ;

MIZOKAWA, T ;

SAITOH, T ;

NAMATAME, H ;

FUJIMORI, A .

PHYSICAL REVIEW B, 1992, 46 (07) :3771-3784

[2] STUDY OF THE K EDGES OF 3D TRANSITION-METALS IN PURE AND OXIDE FORM BY X-RAY-ABSORPTION SPECTROSCOPY [J].

GRUNES, LA .

PHYSICAL REVIEW B, 1983, 27 (04) :2111-2131

[3] CIRCULAR MAGNETIC-X-RAY DICHROISM AT FE K-EDGES IN RARE-EARTH IRON GARNETS [J].

HARADA, I ;

KOTANI, A .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (04) :1285-1288

[4]

HARADA I, IN PRESS J ELECT SPE

[5] MAGNETIC CIRCULAR-DICHROISM AT THE K-EDGE OF NICKEL AND IRON [J].

IGARASHI, J ;

HIRAI, K .

PHYSICAL REVIEW B, 1994, 50 (24) :17820-17829

[6]

KAWATA H, 1994, RESONANT ANOMALOUS X, P557

[7] MAGNETIC CIRCULAR X-RAY DICHROISM AT FE K-EDGE IN FERRIMAGNETIC FE-OXIDES [J].

MARUYAMA, H ;

HARADA, I ;

KOBAYASHI, K ;

YAMAZAKI, H .

PHYSICA B, 1995, 208 (1-4) :760-762

[8]

SETTE F, 1991, XRAY ABSORPTION FINE, P96

[9] ANGLE DEPENDENCE OF X-RAY MAGNETIC CIRCULAR-DICHROISM AT FE K-EDGE IN RARE-EARTH-IRON-GARNET [J].

YAMAZAKI, H ;

MARUYAMA, H ;

KOBAYASHI, K ;

SHIMOMI, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1993, 32 :317-319

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