Magnetic Proerties of an S=1 Heisenberg Antiferromagnet TMNIN with Bond Impurity

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概要

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• We have carried out magnetic sttsceptibility and heat capacity measurements on a typical Hatdane antiferromagnet (CHa),;NNi(NO)a (TN[NIN) doped xvith nonznagnetic Zn" ton impuritiesat the concentrations of T.4'A, l1.8% and 2O.4% and on a pure system down to 0.2 K. At lowtemperatures below 1.2 K, the paraunagnetic sttsceptibility expected in the HaJdane systern withthe open chain is fotund to be suppressed. A broad maximtrm of the heat capacity is observedarotrnd 0.7 K for each imptrrity systena. The observed results strongly suggest that there existsan antif'erromagnetic interaction between the edge S : 172 spins ad.jacent to Zn" ions via thenext-nearest exchange interaction J... which can be regarded as a bond itaaptrrity in the Haldanesystem. This is the first experinaent on bond impturity models f'or the Ilaldtrne systetn.

• 社団法人日本物理学会の論文
• 1997-07-15

著者

• KAWAE Tatsuya

  Department of Applied Quantum Physics, Kyushu University

• TAKEDA Kazuyoshi

  Department of Applied Quantum Physics, Kyushu University

• Ito Masakazu

  Department of Applied Science, Faculty of Engineering, Kyushu University

• MITO Masaki

  Department of Electronics, Faculty of Engineering, Kyushu Institute of Technology

• Masakazu Ito

  Department Of Quantum Matter Adsm Hiroshima University

• Kawae Tatsuya

  Department Of Applied Quantum Physics Kyushu University

• Hitaka Masako

  Department of Applied Science,Faculty of Engineering,Kyushu University

• Motokawa Mitsuhiro

  Crest Japan Science And Technology:institute For Material Research Tohoku University

• Masako Hitaka

  Department Of Physics Faculty Of Science And Engineering Saga University

• Ito Masakazu

  Department Of Applied Science Faculty Of Engineering Kyushu University

• Takeda Kazuyoshi

  Department Of Applied Quantum Physics Faculty Of Engineering Kyushu University:institute Of Environm

• Hitaka Masako

  Department of Applied Science, Faculty of Engineering, Kyushu University

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