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

研究成果: Article査読

11 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号043702
ジャーナルjournal of the physical society of japan
78
4
DOI
出版ステータスPublished - 2009 4
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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