ac Calorimetry and EPR Study on Metal-Insulator Transition and Glass Transition in an Organic Conductor with Double-Column Structure, (DIMET)_2BF_4 : Condensed Matter: Electronic Properties, etc.

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概要

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• Successive metal-insulator transitions in (DIMET)_2BF_4 were studied by chopped-light ac calorimetry and electron paramagnetic resonance (EPR) measurement. An anomaly due to the metal-insulator transitions has been clearly detected in ac calorimetry between 20 and 35K. In contrast to other double-column salts (DMET)_2BF_4 and (DMET)_2CIO_4, successive metal-insulator transitions detected in transport properties are shown to be thermodynamic phase transitions. The EPR detected an anomaly only for the lowest transition around 12K. The properties of the metal-insulator transitions are compared among the DIMET and DMET salts having the double-column structure. A frequency-dependent step in heat capacity was detected around 110 K. The step-like anomaly is attributed to a glass transition due to freezing of the intramolecular motion of the ethylene group in the ET moiety within a DIMET molecule.

• 社団法人日本物理学会の論文
• 2001-06-15

著者

• 齋藤 一弥

  筑波大院数物

• NISHIKAWA Hiroyuki

  Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University

• IKEMOTO Isao

  Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University

• AKUTSU Hiroki

  Graduate School of Material Science, University of Hyogo

• 齊藤 一弥

  阪大理

• Sato Ko-ichi

  Plasma Science Center Nagoya University

• Kobayashi K

  Department Of Pure And Applied Sciences Graduate School Of Arts And Sciences The University Of Tokyo

• Kume K

  Tokyo Metropolitan Univ. Tokyo

• Kume Kiyoshi

  Division Of Gastroenterology Tohoku University Graduate School Of Medicine

• Saito K

  Research Center For Molecular Thermodynamics Graduate School Of Science Osaka University

• SAITO Kazuya

  Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University

• AKUTSU Hiroki

  Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University

• KIKUCHI Koichi

  Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University

• SORAI Michio

  Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University

• Nojiri Hiroyuki

  Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Kikuchi Koichi

  Department Of Chemistry Tokyo Metropolitan University

• Nishikawa H

  Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Nishikawa H

  Tokyo Metropolitan Univ. Tokyo Jpn

• Nishikawa H

  Department Of Pharmacology Faculty Of Pharmaceutical Sciences Kinki University

• NISHIKAWA Hiroyuki

  Graduate School of Pure and Applied Sciences, University of Tsukuba

• Kume K

  Department Of Physics Tokyo Metropolitan University

• Ikemoto I

  Department Of Chemistry Tokyo Metropolitan University

• Ikemoto Isao

  Department Of Chemistry Faculty Of Science Tokyo Metropolitan University

• Ikemoto Isao

  Department Of Chemistry Tokyo Metropolitan University

• Nishikawa Hiroyuki

  Graduate School Of Pure And Applied Sciences University Of Tsukuba

• Saito G

  Department Of Chemistry Faculty Of Science Tokyo Metropolitan University

• Kikuchi K

  Tokyo Gas Co. Ltd. Yokohama Jpn

• Nishikawa Hiroyuki

  Department Of Breast And Endocrine Surgery St. Marianna University School Of Medicine

• Kajimura K

  Electrotechnical Laboratory

• Kajimura Koji

  Electrotechnical Laboratory Tsukuba Research Center

• Saito K

  Department Of Applied Physics Graduate School Of Engineering The University Of Tokyo

• Saito Kazuya

  Research Center For Advanced Photon Technology Toyota Technological Institute

• Sorai M

  Osaka Univ. Osaka

• Sorai Michio

  Research Center For Molecular Thermodynamics Graduate School Of Science Osaka University

• Akutsu H

  Graduate School Of Material Science University Of Hyogo

• Kajimura Koji

  Electrotgechnical Laboratory Mukodai

• Ikemoto Isao

  Department of Chemistry, Tokyo Metropolitan University

• Nishikawa Hiroyuki

  Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan

• Ikemoto Isao

  Department of Chemistry and Research Center for Spectrochemistry, Faculty of Science, The University of Tokyo

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