High-Field Multi-Frequency ESR in the Quasi-1D S = 1/2 Ising-Like Antiferromagnet BaCo2V2O8 in a Transverse Field

A. Okutani, S. Kimura, T. Takeuchi, M. Hagiwara

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6 Citations (Scopus)

Abstract

We have performed high-field multi-frequency electron spin resonance (ESR) measurements of a single crystal of the S = 1/2 quasi one-dimensional (1D) Ising-like antiferromagnet BaCo2V2O8 at 1.5 K in magnetic fields of up to 14 T applied along [110] and [100] directions. Two main ESR branches, which are ascending and descending with increasing magnetic fields, are observed from 400 GHz at zero magnetic field in both cases. The low ESR mode shows a softening near 10 T for H || [100], while no softening was observed below 14 T for H || [110]. This difference in the magnetic excitations may explain the distinct phase diagrams for these two directions.

Original languageEnglish
Pages (from-to)1003-1006
Number of pages4
JournalApplied Magnetic Resonance
Volume46
Issue number9
DOIs
Publication statusPublished - 2015 Oct 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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