Lattice Deformations Induced by an Applied Magnetic Field in the Frustrated Antiferromagnet HgCr<SUB>2</SUB>O<SUB>4</SUB>

• Tanaka Yoshikazu

  RIKEN SPring-8 Center, Harima Institute

• Narumi Yasuo

  ISSP, University of Tokyo

• Terada Noriki

  RIKEN SPring-8 Center, Harima Institute

• Katsumata Koichi

  RIKEN SPring-8 Center, Harima Institute

• Ueda Hiroaki

  ISSP, University of Tokyo

• Staub Urs

  Swiss Light Source, Paul Scherrer Institut

• Kindo Koichi

  ISSP, University of Tokyo

• Fukui Tomoya

  ISSP, University of Tokyo

• Yamamoto Tomohide

  KYOKUGEN, Osaka University

• Kammuri Ryotaro

  KYOKUGEN, Osaka University

• Hagiwara Masayuki

  KYOKUGEN, Osaka University

• Kikkawa Akiko

  RIKEN SPring-8 Center, Harima Institute

• Ueda Yutaka

  ISSP, University of Tokyo

• Toyokawa Hidenori

  SPring-8/JASRI

• Ishikawa Tetsuya

  RIKEN SPring-8 Center, Harima Institute

• Kitamura Hideo

  RIKEN SPring-8 Center, Harima Institute

Bibliographic Information

Other Title

• Lattice deformations induced by an applied magnetic field in the frustrated antiferromagnet HgCr2O4

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, T_N\\simeq6 K, to relieve the geometrical frustration. Below T_N, 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

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 76 (4), 043708-043708, 2007

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• geometric frustration
• X-ray diffraction
• high magnetic field
• HgCr<SUB>2</SUB>O<SUB>4</SUB>

Details

• CRID: 1390001204194052608
• NII Article ID: 130005296783
• NII Article ID: 110006278033
• NII Article ID: 210000106620
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.76.043708
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 8705818
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8705818
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.76.043708
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed