Reviews of topical problems

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.

Text can be downloaded in Russian. English translation is available on IOP Science.
PACS: 75.25.+z, 75.30.Cr, 76.60.-d (all)
DOI: 10.1070/PU2000v043n04ABEH000636
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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