Order from disorder in a kagome antiferromagnet

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Abstract

It will be discussed to what extent the large S approach to an antiferromagnet on a kagome lattice can explain the data of magnetothermal and neutron scattering experiments on a stacked kagome antiferromagnet Sr-Cr-Ga-O. In particular, it will be shown that quantum fluctuations lift the classical degeneracy related to a large amount of frustration in a kagome lattice and give rise to a finite velocity of spin-wave excitations which is by a factor S -1/3 smaller than for a conventional antiferromagnet.

Original languageEnglish (US)
Pages (from-to)5639-5641
Number of pages3
JournalJournal of Applied Physics
Volume73
Issue number10
DOIs
StatePublished - Dec 1 1993

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