“Spin-Driven” Crystal Lattice Distortion in Frustrated Magnet CuFeO<sub>2</sub>: Synchrotron X-ray Diffraction Study
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- Terada Noriki
- Department of Physics, Faculty of Science, Tokyo University of Science
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- Mitsuda Setsuo
- Department of Physics, Faculty of Science, Tokyo University of Science
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- Ohsumi Hiroyuki
- Japan Synchrotron Radiation Research Institute
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- Tajima Keisuke
- Department of Physics, Faculty of Science and Technology, Keio University
書誌事項
- タイトル別名
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- “Spin-Driven” Crystal Lattice Distortion in Frustrated Magnet CuFeO2: Synchrotron X-ray Diffraction Study
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We have performed synchrotron radiation X-ray diffraction measurements on a triangular lattice antiferromagnet CuFeO2, using the single crystal. The crystal lattice symmetry lowers from hexagonal to orthorhombic below the magnetic phase transition (from a partially disordered phase to four-sublattice phase) temperature TN2. In addition, superlattice reflections were observed below TN2; this suggests that the “scalene triangle model” lattice distortion splits the nearest neighbor exchange interaction in the basal plane into three different exchange interactions. This distortion lifts the vast degeneracy of the strongly frustrated spin system, leading to the four-sublattice ground state. Thus we argue that the lattice degree of freedom plays an important role in the stabilization of the four-sublattice ground state in CuFeO2.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 75 (2), 023602-, 2006
一般社団法人 日本物理学会
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詳細情報
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- CRID
- 1390001204188731648
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- NII論文ID
- 110004086852
- 210000105981
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2006JPSJ...75b3602T
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 7812771
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可