Pressure-induced Spin State Transition in Co-Fe Cyanide

• Hanawa Hasafumi

  Department of Applied Physics, Nagoya University PRESTO, JST

• Moritomo Yutaka

  Department of Applied Physics, Nagoya University PRESTO, JST

• Tateishi Junichiro

  Department of Applied Physics, Nagoya University

• Ohishi Yasuo

  Japan Synchrotron Radiation Research Institute

• Kato Kenichi

  Japan Synchrotron Radiation Research Institute

Abstract

Hydrostatic pressure effects on the structural and magnetic properties were investigated for two potassium–cobalt-iron hexacyanides, K_0.12Co[Fe(CN)₆]_0.70·4.87H₂O (high [Fe(CN)₆] vacancy concentration v) and K_0.36Co[Fe(CN)₆]_0.82·4.56H₂O (low-v). In both the compounds, we observed a pressure-induced volume transition at 300 K from the large volume (LV) phase to the small volume (SV) phase. In the high-v compound, the magnitude of the effective moment μ_eff gradually decreases with pressure increases. We ascribed it to the gradual spin state transformation of Co³⁺ from the high-spin state (S=2) to the low-spin state (S=0).

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 73 (10), 2759-2762, 2004

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• Co–Fe cyanide
• spin state transition
• pressure effect

Details

• CRID: 1390001204188344576
• NII Article ID: 110001979200
• NII Article ID: 210000105081
• NII Article ID: 130004538593
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.73.2759
• BIBCODE: 2004JPSJ...73.2759H
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 7121063
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7121063
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.73.2759
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
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  • CiNii Articles
• Abstract License Flag: Disallowed