Bismuth-induced enhancement of magneto-optical effects in iron garnets: A theoretical analysis / Moskvin AS,Zenkov AV // PHYSICS OF THE SOLID STATE. - 2002. - V. 44, l. 10. - P. 1898-1906.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

A semiquantitative model of circular magneto-optical effects in iron garnets is constructed within the concept of charge-transfer transitions and the existing qualitative notions. In the framework of the proposed model, the drastic enhancement of circular magneto-optical effects in R3Fe5O12 iron garnets containing impurities of Bi3+ or Pb2+ ions is explained by the increase in the oxygen contribution to the spin-orbit coupling constant of the (FeO6)(9-) and (FeO4)(5-) complexes (the main magneto-optically active centers in iron garnets). This increase is associated with the covalent admixture of the Bi3+ (or Pb2+) 6p orbitals (with a giant one-electron spin-orbit coupling constant) to the oxygen 2p orbitals. The influence of the substitution does not reduce to an enhancement of the oxygen spin-orbit interaction alone but also leads to the appearance of the effective anisotropic tensor contributions to the spin-orbit interaction and circular magneto-optical effects. These contributions to the magneto-optical effects in garnets are estimated. The influence of an inhomogeneous bismuth distribution on the magneto-optical effects in Y3 - xBixFe5O12 garnets is investigated using computer simulation. Analysis of the available experimental data on the magneto-optical effects in garnets confirms the validity of the theoretical model proposed. (C) 2002 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

SPECTRA; FE3+

DOI:

10.1134/1.1514779

Web of Science ID:

ISI:000178374400013

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Keywords-Plus	SPECTRA; FE3+
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Number-of-Cited-References	12
Usage-Count-Since-2013	1
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	600DB