High Field ESR and Magnetization in Na_2Co_2 (C_2O_4)_3(H_2O)_2(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• We report the results of electron spin resonance (ESR) and magnetization measurements in high magnetic fields up to about 52T on single crystal and powder samples of the cobalt compound Na_2Co_2(C_2O_4)_3(H_2O)_2 which consists of two-leg ladders of Co^<2+> ions. This compound was reported to be a candidate which show a signature of a quantum phase transition from a spin-liquid to a Neel ordered state [Z. Honda et al.: Phys. Rev. Lett. 95 (2005) 087204]. From our ESR and magnetization experiments, we, however, have found that the compound is well described by almost isolated antiferromagnetic dimers which are formed by the nearest Co spins on the rungs and the interaction along the rung direction is much larger than that along the leg one. The ESR frequency-field diagram, magnetic susceptibility and magnetization are in good agreement with those calculated from this isolated dimer model.

• 社団法人日本物理学会の論文
• 2006-12-15

著者

• KINDO Koichi

  Institute for Solid State Physics, University of Tokyo

• KINDO Koichi

  The Institute for Solid State Physics, The University of Tokyo

• KIMURA Shojiro

  KYOKUGEN, Osaka University

• HAGIWARA Masayuki

  KYOKUGEN, Osaka University

• Kindo Koichi

  The Institute For Solid State Physics The University Of Tokyo

• Kindo Koichi

  Institute For Solid State Physics The University Of Tokyo

• Kimura Shojiro

  Kyokugen Osaka University

• Hagiwara Masayuki

  Riken (the Institute Of Physical And Chemical Research):graduate School Of Integrated Science Yokoha

• KASHIWAGI Takanari

  KYOKUGEN, Osaka University

• HONDA Zentaro

  Graduate School of Science and Engineering, Saitama University

• NAKAGAWA Yoshiyuki

  KYOKUGEN (Center for Quantum Science and Technology under Extreme Conditions), Osaka University

• YAMAGUCHI Hironori

  KYOKUGEN (Center for Quantum Science and Technology under Extreme Conditions), Osaka University

• HONDA Zentaro

  Faculty of Engineering, Saitama University

• YAMADA Koji

  Faculty of Engineering, Saitama University

• Hagiwara Makoto

  Faculty Of Engineering Yokohama National University

• Hagiwara Makoto

  Department Of Electronics And Information Science Faculty Of Engineering And Design Kyoto Institute

• Kimura S

  Kyokugen Osaka University

• Kashiwagi Takanari

  Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University

• Nakagawa Yoshiyuki

  Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University:(pres

• Hagiwara Masayuki

  Kyokugen Osaka University

• Hori M

  Department Of Physics Tokyo Institute Of Technology

• Honda Zentaro

  Faculty Of Engineering Saitama University

• Kimura S

  Osaka Univ. Toyonaka

• Hagiwara Masayuki

  Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University

• Yamaguchi Hironori

  Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University

• Honda Zentaro

  Saitama Univ. Saitama

• Yamada Koji

  Faculty Of Engineering Saitama University

• Kimura Shojiro

  Kyokugen (center For Quantum Science And Technology Under Extreme Conditions) Osaka University

• Kimura Shojiro

  KYOKUGEN (Center for Quantum Science and Technology under Extreme Conditions), Osaka University

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