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

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

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
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - May 2004

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Acetone
Magnetic susceptibility
acetone
Paramagnetic resonance
Phase transitions
magnetic permeability
shift
Temperature
Molecules
anomalies
molecules
temperature

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

ESR study on the distorted kagome antiferromagnet m-MPYNN BF4 1/3 acetone. / Kambe, Takashi; Oshima, K.; Fujita, W.; Awaga, K.

In: Journal of Magnetism and Magnetic Materials, Vol. 272-276, No. SUPPL. 1, 05.2004.

Research output: Contribution to journalArticle

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AU - Awaga, K.

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AB - 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.

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