Lattice Deformations Induced by an Applied Magnetic Field in the Frustrated Antiferromagnet HgCr<SUB>2</SUB>O<SUB>4</SUB>
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- Tanaka Yoshikazu
- RIKEN SPring-8 Center, Harima Institute
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- Narumi Yasuo
- ISSP, University of Tokyo
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- Terada Noriki
- RIKEN SPring-8 Center, Harima Institute
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- Katsumata Koichi
- RIKEN SPring-8 Center, Harima Institute
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- Ueda Hiroaki
- ISSP, University of Tokyo
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- Staub Urs
- Swiss Light Source, Paul Scherrer Institut
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- Kindo Koichi
- ISSP, University of Tokyo
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- Fukui Tomoya
- ISSP, University of Tokyo
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- Yamamoto Tomohide
- KYOKUGEN, Osaka University
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- Kammuri Ryotaro
- KYOKUGEN, Osaka University
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- Hagiwara Masayuki
- KYOKUGEN, Osaka University
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- Kikkawa Akiko
- RIKEN SPring-8 Center, Harima Institute
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- Ueda Yutaka
- ISSP, University of Tokyo
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- Toyokawa Hidenori
- SPring-8/JASRI
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- Ishikawa Tetsuya
- RIKEN SPring-8 Center, Harima Institute
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- Kitamura Hideo
- RIKEN SPring-8 Center, Harima Institute
Bibliographic Information
- Other Title
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- Lattice deformations induced by an applied magnetic field in the frustrated antiferromagnet HgCr2O4
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Abstract
The way geometric frustration in the pyrochlore antiferromagnet HgCr2O4 is relieved by an applied magnetic field is studied by synchrotron X-ray diffraction. The material shows a structural change, from cubic to orthorhombic, at the magnetic transition temperature, TN\\simeq6 K, to relieve the geometrical frustration. Below TN, successive magnetic phase transitions occur in an applied field, from the antiferromagnetic to the half-magnetization plateau phase followed by a transition with a kink in the magnetization. We find that the lattice constant shows discontinuous expansions that coincide with magnetization changes, indicating progressive relief of geometric frustration. We calculate the lattice deformation invoking a magneto-elastic coupling and obtain good agreement between the calculation and our observation.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 76 (4), 043708-043708, 2007
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204194052608
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- NII Article ID
- 130005296783
- 110006278033
- 210000106620
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 8705818
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed