^<77>Se NMR Evidence for the Development of Antiferromagnetic Spin Fluctuations of π-Electrons in λ-(BETS)_2GaCl_4

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概要

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• The microscopic magnetic properties of (T_c ≅ 6K) λ-(BETS)_2GaCl_4 (BETS = bis(ethylenedithio)tetrasclenafulvalene) have been investigated by 7^<77>Se NMR in the normal stale between 7.1 and 100K on randomly oriented single crystals with κ-(BETS)_2GaCl_4 as a reference compound. From the T-dependences of the Knight shift and the linewidth, the intrinsic uniformsusceptibility χ_<q=0>(T) has been found to decrease with decreasing T below 30K for λ-(BETS)_2GaCl_4. Nevertheless, 1/(T_1T) does not show any corresponding decrease but is constant down to the lowest T, which indicates increasing contributions with decreasing T from antiferromagnelic spin fluctuations. The Knight shift and 1/(T_1T) have been analyzed quantitatively and the enhancement factor K(α) < 1 is deduced in the low-T limit. On the basis of these results, the development of antiferromagnetic spin fluctuations of π-electrons at low T is concluded for λ-(BETS)_2GaCl_4

• 社団法人日本物理学会の論文
• 2003-03-15

著者

• NEGISHI Eiichi

  Physics Department, Graduate School of Science, Tohoku University

• MATSUI Hiroshi

  Physics Department, Graduate School of Science, Tohoku University

• TOYOTA Naoki

  Physics Department, Graduate School of Science, Tohoku University

• TAKAGI Shigeru

  Physics Department, Graduate School of Science, Tohoku University

• Endo S

  Osaka Univ. Osaka

• Endo S

  Research Center For Materials And Science At Extreme Conditions Osaka University

• Endo S

  Center For Interdisciplinary Research Tohoku University

• Takagi S

  Physics Department Graduate School Of Science Tohoku University

• Hedo M

  Institute For Solid State Physics University Of Tokyo

• Matsui H

  Graduate School Of Science Osaka University

• Takagi Shigeru

  Physics Department Graduate School Of Science Tohoku University

• Toyota N

  Physics Department Graduate School Of Science Tohoku University

• Namiki Takahisa

  Institute For Materials Research Tohoku University

• Toyota Naoki

  Physics Department Graduate School Of Science Tohoku University

• Toyota Naoki

  Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc

• Negishi E

  Physics Department Graduate School Of Science Tohoku University

• Negishi Eiichi

  Physics Department Graduate School Of Science Tohoku University

• Tateiwa Naoyuki

  Graduate School Of Science Tohoku University:(present) Department Of Physical Science Graduate Schoo

• MARUTA Daisuke

  Physics Department, Graduate School of Science, Tohoku University

• UOZAKI Hiroshi

  Physics Department, Graduate School of Science, Tohoku University

• TSUCHIYA Hideaki

  Physics Department, Graduate School of Science, Tohoku University

• ABE Yasunori

  Physics Department, Graduate School of Science, Tohoku University

• ISHIZAKI Yusuke

  Physics Department, Graduate School of Science, Tohoku University

• ENDO Satoshi

  Center for Interdisciplinary Research, Tohoku University

• SASAKI Hiko-ichiro

  Physics Department, Graduate School of Science, Tohoku University

• Minaguchi Hiroshi

  Department Of Obstetrics And Gynecology Yokohama City University School Of Medicinedepartment Of Obs

• Endo S

  Osaka Univ. Toyonaka Jpn

• Endo Satoshi

  Center For Interdisciplinary Research Tohoku University

• Matsui Hiroshi

  Graduate School Of Science Osaka University

• 遠藤 三郎

  Center For Interdisciplinary Research Tohoku University

• Abe Yasunori

  Physics Department Graduate School Of Science Tohoku University

• Uozaki Hiroshi

  Department Of Pathology And Diagnostic Pathology Graduate School Of Medicine University Of Tokyo

• Maruta Daisuke

  Physics Department Graduate School Of Science Tohoku University

• Mukuda Hidekazu

  Graduate School Of Science Osaka University

• Tsuchiya H

  Physics Department Graduate School Of Science Tohoku University

• Ishizaki Y

  Physics Department Graduate School Of Science Tohoku University

• Sasaki Hiko-ichiro

  Physics Department Graduate School Of Science Tohoku University

• Matsui Hiroshi

  Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc

• Matsui Hiroshi

  Physics Department Graduate School Of Science Tohoku University

• Muranaka Hiroshi

  Graduate School Of Science Osaka University

• Matsui Hiroshi

  Physics Department Graduate School Of Science Tohoku University:center For Interdisciplinary Researc

• Terada N

  Musashi Inst. Technology Tokyo

• Ishizaki Yusuke

  Physics Department, Graduate School of Science Tohoku University, Sendai 980-8578

• Uozaki Hiroshi

  Physics Department, Graduate School of Science Tohoku University, Sendai 980-8578

• Tsuchiya Hideaki

  Physics Department, Graduate School of Science Tohoku University, Sendai 980-8578

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