Exchange interactions of the chromium spinel oxide HgCr2O4 in high magnetic fields examined by the magnetoelastic theory

Shojiro Kimura, Masayuki Hagiwara, Tetsuya Takeuchi, Hironori Yamaguchi, Hiroaki Ueda, Koichi Kindo

研究成果: Article査読

5 被引用数 (Scopus)

抄録

The chromium spinel oxide HgCr2O4is known to show a peculiar 1/2-plateau in its magnetization curve. The appearance of the magnetization plateau has been interpreted by classical theories, which take into account the magnetoelastic interaction. In this study, we suggest that not only the magnetization curve but also the change in the exchange interaction, which occurs due to lattice distortions during the magnetization process, can be calculated based on the magnetoelastic theory, proposed by Penc et al. We show that the field dependence of the magnetization and the exchange constants, obtained from our previous experiments, agree well with those calculated by the magnetoelastic theory, except for the behaviors prior to the fully polarized phase. This result indicates that an unexpected phase exists just before the saturation of the magnetization in this compound.

本文言語English
論文番号113709
ジャーナルjournal of the physical society of japan
83
11
DOI
出版ステータスPublished - 2014 11月 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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