ESR study on the distorted kagome antiferromagnet m-MPYNN BF4 1/3 acetone

T. Kambe, K. Oshima, W. Fujita, K. Awaga

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Abstract

We carefully examined ESR and magnetic susceptibility around Ts = 128.7K, at which the structural phase transition takes place, of m-MPYNN BF4 1/3 acetone. Both the ESR parameters and the magnetic susceptibility have a clear anomaly around Ts. The g-factor shows a clear shift around Ts independently of the shape of the samples. It possibly corresponds to the shift of MPYNN molecules accompanied by the structural phase transition. Moreover, the Weiss temperature is obtained to be +22.7 K above Ts and +3.42 K below Ts, respectively. These results suggest that the lattice distortion plays an important role on the low-temperature spin-gap state.

Original languageEnglish
Pages (from-to)e1041-e1043
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - May 1 2004

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Keywords

  • Kagome
  • S = 1
  • Structural phase transition
  • m-MPYNN BF 1/3 acetone

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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