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

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

doi:10.1016/j.jmmm.2003.12.480

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

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

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

We carefully examined ESR and magnetic susceptibility around T_s = 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 T_s. The g-factor shows a clear shift around T_s 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 T_s and +3.42 K below T_s, respectively. These results suggest that the lattice distortion plays an important role on the low-temperature spin-gap state.

Original language	English
Pages (from-to)	e1041-e1043
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.480
Publication status	Published - 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

Cite this

Kambe, T., Oshima, K., Fujita, W., & Awaga, K. (2004). ESR study on the distorted kagome antiferromagnet m-MPYNN BF₄ 1/3 acetone. Journal of Magnetism and Magnetic Materials, 272-276(SUPPL. 1), e1041-e1043. https://doi.org/10.1016/j.jmmm.2003.12.480

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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.",

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AU - Oshima, K.

AU - Fujita, W.

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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10.1016/j.jmmm.2003.12.480