Magnetic Susceptibility of a Spin 1/2 Heisenberg Antiferromagnetic Chain: (3,3'-Dimethyl-2,2'-Thiazolinocyanine)-TCNQ.

  • Deguchi Hiroyuki
    Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 804
  • Takagi Seishi
    Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 804
  • Mito Masaki
    Department of Applied Science, Faculty of Engineering, Kyushu University, Fukuoka 812
  • Takahashi Minoru
    Institute for Solid State Physics, The University of Tokyo, Roppongi, Minato–ku, Tokyo 106
  • Takeda Kazuyoshi
    Department of Applied Science, Faculty of Engineering, Kyushu University, Fukuoka 812

Bibliographic Information

Other Title
  • Magnetic Susceptibility of a Spin 1/2 Heisenberg Antiferromagnetic Chain:〔3,3′-Dimethyl-2,2′-Thiazolinocyanine〕-TCNQ
  • Magnetic Susceptibility of a Spin 12 He
  • Magnetic Susceptibility of a Spin 1/2 Heisenberg Antiferromagnetic Chain: [3,3<sup>′</sup>-Dimethyl-2,2<sup>′</sup>-Thiazolinocyanine]-TCNQ
Published
1996
DOI
  • 10.1143/jpsj.65.1934
Publisher
THE PHYSICAL SOCIETY OF JAPAN

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Description

Magnetic susceptibility of an organic ion-radical salt, [3, 3-dimethyl-2, 2-thiazolinocyanine]-TCNQ, is measured in the temperature range of 1.4--300, K. Above 10, K, it is quantitatively explained in terms of a S=1/2 Heisenberg antiferromagnetic chain with J/kB=-32.5, K based on the Bonner-Fisher curve. Below 10, K, however, the measured susceptibility seems to show the characteristic slope reported by Eggert et al. down to the ordering temperature Tc=1.49, K. Below Tc the heat capacity of this salt displays the temperature dependence expected for a gapless spin-wave excitation, which rules out the spin-Peierls transition in this system.

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