Field induced lattice deformation in the quantum antiferromagnet SrCu 2(BO3)2

Yasuo Narumi; Noriki Terada; Yoshikazu Tanaka; Masahiro Iwaki; Koichi Katsumata; Koichi Kindo; Hiroshi Kageyama; Yutaka Ueda; Hidenori Toyokawa; Tetsuya Ishikawa; Hideo Kitamura

doi:10.1143/JPSJ.78.043702

Field induced lattice deformation in the quantum antiferromagnet SrCu ₂(BO₃)₂

Yasuo Narumi, Noriki Terada, Yoshikazu Tanaka, Masahiro Iwaki, Koichi Katsumata, Koichi Kindo, Hiroshi Kageyama, Yutaka Ueda, Hidenori Toyokawa, Tetsuya Ishikawa, Hideo Kitamura

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

11 Citations (Scopus)

Abstract

The results of synchrotron X-ray diffraction by the coupled dimer compound SrCu₂(BO₃)₂ subjected to a pulsed high magnetic field are reported. We find the lattice constant, a, contracts with increasing magnetic field. This change in the lattice constant scales with the magnetization change. We argue that the nearest neighbor exchange interaction between Cu²⁺ spins is an antiferromagnetic one through an oxygen and its strength depends on the bond angle Cu²⁺-O²-Cu ²+. The bond length between the Cu ions in a triplet becomes shorter to make the bond angle smaller and to diminish the antiferromagnetic exchange interaction. We propose this mechanism as a main source of the lattice contraction.

Original language	English
Article number	043702
Journal	journal of the physical society of japan
Volume	78
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.78.043702
Publication status	Published - 2009 Apr
Externally published	Yes

Keywords

Exchange interaction
High magnetic field
Magneto-elastic coupling
SrCu(BO)
Synchrotron X-ray diffraction

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.78.043702

Cite this

Field induced lattice deformation in the quantum antiferromagnet SrCu ₂(BO₃)₂. / Narumi, Yasuo; Terada, Noriki; Tanaka, Yoshikazu; Iwaki, Masahiro; Katsumata, Koichi; Kindo, Koichi; Kageyama, Hiroshi; Ueda, Yutaka; Toyokawa, Hidenori; Ishikawa, Tetsuya; Kitamura, Hideo.

In: journal of the physical society of japan, Vol. 78, No. 4, 043702, 04.2009.

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

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abstract = "The results of synchrotron X-ray diffraction by the coupled dimer compound SrCu2(BO3)2 subjected to a pulsed high magnetic field are reported. We find the lattice constant, a, contracts with increasing magnetic field. This change in the lattice constant scales with the magnetization change. We argue that the nearest neighbor exchange interaction between Cu2+ spins is an antiferromagnetic one through an oxygen and its strength depends on the bond angle Cu2+-O2-Cu 2+. The bond length between the Cu ions in a triplet becomes shorter to make the bond angle smaller and to diminish the antiferromagnetic exchange interaction. We propose this mechanism as a main source of the lattice contraction.",

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AU - Narumi, Yasuo

AU - Terada, Noriki

AU - Tanaka, Yoshikazu

AU - Iwaki, Masahiro

AU - Katsumata, Koichi

AU - Kindo, Koichi

AU - Kageyama, Hiroshi

AU - Ueda, Yutaka

AU - Toyokawa, Hidenori

AU - Ishikawa, Tetsuya

AU - Kitamura, Hideo

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AB - The results of synchrotron X-ray diffraction by the coupled dimer compound SrCu2(BO3)2 subjected to a pulsed high magnetic field are reported. We find the lattice constant, a, contracts with increasing magnetic field. This change in the lattice constant scales with the magnetization change. We argue that the nearest neighbor exchange interaction between Cu2+ spins is an antiferromagnetic one through an oxygen and its strength depends on the bond angle Cu2+-O2-Cu 2+. The bond length between the Cu ions in a triplet becomes shorter to make the bond angle smaller and to diminish the antiferromagnetic exchange interaction. We propose this mechanism as a main source of the lattice contraction.

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