Large change in the exchange interactions of HgCr2O4 under very high magnetic fields

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

doi:10.1103/PhysRevB.83.214401

Large change in the exchange interactions of HgCr₂O₄ under very high magnetic fields

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

High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The combination of high-frequency electron magnetic resonance (EMR) and magnetization measurements enables us to evaluate the exchange interactions in high-field phases of polycrystalline samples of the chromium spinel oxide HgCr₂O₄. The evaluation indicates that the lattice distortion in this compound largely modulates the exchange interactions between the Cr3⁺ spins to stabilize its distinct plateau with one-half of the saturation magnetization. Furthermore, we show that a release of the lattice distortion occurs in very high magnetic fields. Our result suggests that the spin-lattice coupling, which causes the large changes in the exchange interactions, plays a crucial role in giving rise to the peculiar magnetization process of HgCr₂O₄.

Original language	English
Article number	214401
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.83.214401
Publication status	Published - 2011 Jun 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.83.214401

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Large change in the exchange interactions of HgCr₂O₄ under very high magnetic fields. / Kimura, Shojiro; Hagiwara, Masayuki; Takeuchi, Tetsuya; Yamaguchi, Hironori; Ueda, Hiroaki; Ueda, Yutaka; Kindo, Koichi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 21, 214401, 01.06.2011.

Research output: Contribution to journal › Article › peer-review

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AU - Kindo, Koichi

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AB - The combination of high-frequency electron magnetic resonance (EMR) and magnetization measurements enables us to evaluate the exchange interactions in high-field phases of polycrystalline samples of the chromium spinel oxide HgCr2O4. The evaluation indicates that the lattice distortion in this compound largely modulates the exchange interactions between the Cr3+ spins to stabilize its distinct plateau with one-half of the saturation magnetization. Furthermore, we show that a release of the lattice distortion occurs in very high magnetic fields. Our result suggests that the spin-lattice coupling, which causes the large changes in the exchange interactions, plays a crucial role in giving rise to the peculiar magnetization process of HgCr2O4.

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Large change in the exchange interactions of HgCr₂O₄ under very high magnetic fields

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