Bismuth-induced increase of the magneto-optical effects in iron garnets: a theoretical analysis / Zenkov AV,Moskvin AS // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2002. - V. 14, l. 28. - P. 6957-6968.

ISSN/EISSN:

0953-8984 / нет данных

Type:

Article

Abstract:

In the framework of the concept of charge-transfer transitions, we suggest a semi-quantitative model which explains the strong increase of the circular magneto-optical effects in the iron garnets (IG) R3Fe5O12 upon doping with Bi3+ or Pb2+ ions. The covalent admixture of Bi3+, Pb2+ 6p orbitals (with giant one-electron spin-orbit coupling constant) with oxygen 2p states causes growth of the oxygen contribution to the spin-orbit coupling constant of (FeO6)(9-), (FeO4)(5-) complexes (the main magneto-optically active centres of IG). The enhanced spin-orbit interaction of the oxygen is Hot the only effect of substitution; it also gives rise to the effective anisotropic tensor addend to the spin-orbit interaction and the circular magneto-optical effects in IG as well. A computer simulation of the magneto-optical spectra Of Y3-xBixFe5O12 for the case of an inhomogeneous bismuth distribution is carried out. Estimates of various contributions to the IG rnagneto-optical effects are given. The anisotropic tensor mechanism yields a contribution to the Faraday effect which is comparable in magnitude with the `ordinary' ferromagnetic contribution. Analysis of experimental data on the magneto-optical effects in garnets supports our theoretical model.

Author keywords:

FARADAY-ROTATION; SPECTRA; TENSOR; FILMS; FE3+; YIG

DOI:

10.1088/0953-8984/14/28/307

Web of Science ID:

ISI:000177360500012

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL 22
Publisher	IOP PUBLISHING LTD
Address	DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	PII S0953-8984(02)34400-X
Keywords-Plus	FARADAY-ROTATION; SPECTRA; TENSOR; FILMS; FE3+; YIG
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Number-of-Cited-References	19
Usage-Count-Since-2013	8
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	582PN