Field-induced order-disorder transition in antiferromagnetic BaCo2V2O8 driven by a softening of spinon excitation

S. Kimura, H. Yashiro, K. Okunishi, M. Hagiwara, Z. He, K. Kindo, T. Taniyama, M. Itoh

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68 Citations (Scopus)

Abstract

High field magnetization and ESR measurements on the quasi-one-dimensional (1D) antiferromagnet BaCo2V2O8 have been performed in magnetic fields up to 50 T along the chain. The experimental results are explained well in terms of a 1D S=1/2 antiferromagnetic XXZ model in longitudinal fields. We show that the quantum phase transition from the Néel ordered phase to the spin liquid one in the model is responsible for a peculiar order to disorder transition in BaCo2V2O8.

Original languageEnglish
Article number087602
JournalPhysical review letters
Volume99
Issue number8
DOIs
Publication statusPublished - 2007 Aug 25
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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