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Influence of quantum fluctuations on the magnetic properties of quasi-one-dimensional triangular antiferromagnets


Institute of Spectroscopy, Russian Academy of Sciences, ul. Fizicheskaya 5, Troitsk, Moscow, 108840, Russian Federation

A review is presented of the experimental work on the influence of quantum fluctuations on the magnetization and the mean spin of magnetic sublattices in quasi-one-dimensional triangular antiferromagnets. The principal results in this area are the strong magnetic-field dependence of magnetic sublattice mean spins; anisotropy of mean spin values in magnetically nonequivalent antiferromagnetic chains; the reduction of magnetization compared to the classical spin case; the nonlinear growth of the parallel magnetic susceptibility; a residual magnetization anisotropy at high fields. The results obtained are explained based on the spin-wave theory of quantum fluctuations in antiferromagnets. A new magnetic phase was observed in CsMnI3 for H \parallel C6 and shown to be due to the anisotropy of the mean spins of the sublattices.

Fulltext is available at IOP
PACS: 75.25.+z, 75.30.Cr, 76.60.-d (all)
DOI: 10.1070/PU2000v043n04ABEH000636
URL: https://ufn.ru/en/articles/2000/4/c/
Citation: Dumesh B S "Influence of quantum fluctuations on the magnetic properties of quasi-one-dimensional triangular antiferromagnets" Phys. Usp. 43 365–380 (2000)
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Оригинал: Думеш Б С «Влияние квантовых флуктуаций на магнитные свойства квазиодномерных треугольных антиферромагнетиков» УФН 170 403–418 (2000); DOI: 10.3367/UFNr.0170.200004c.0403

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