Reviews of topical problems

Anisotropic interactions in magnetic crystals with S-state ions. Nanostructures

Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Academgorodok 50, str. 38, Krasnoyarsk, 660036, Russian Federation

Anisotropy mechanisms in S-ion compounds are discussed, in particular the "single-ion" exchange mechanism which was developed theoretically by Nikiforov and coworkers based on the two-ion model and which has only recently received detailed experimental study. Results demonstrating the significant role of the "single-ion" source are presented. An independent generalized method for quantitatively describing and predicting the anisotropy of magnetically ordered crystals is discussed, and its potential for the investigation of the BiFeO3 multiferroic in the region of the existence of a spin cycloid is examined. The anisotropic interactions responsible for the formation of nanostructures in the form of spin vortices (skyrmions) in MnSi and Cu2OSeO3 are analyzed.

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Fulltext is also available at DOI: 10.3367/UFNe.0184.201412b.1299
PACS: 75.25.-j, 75.30.Gw, 76.30.Fc (all)
DOI: 10.3367/UFNe.0184.201412b.1299
Citation: Ovchinnikov S G, Rudenko V V "Anisotropic interactions in magnetic crystals with S-state ions. Nanostructures" Phys. Usp. 57 1180–1198 (2014)
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Received: 21st, December 2013, revised: 21st, June 2014, 24th, June 2014

Оригинал: Овчинников С Г, Руденко В В «Анизотропные взаимодействия в магнитных кристаллах с ионами в S-состоянии. Наноструктуры» УФН 184 1299–1318 (2014); DOI: 10.3367/UFNr.0184.201412b.1299

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