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

Tatsuya Kawae, Masakazu Ito, Masaki Mito, Masako Hitaka, Kazuyoshi Takeda

Research output: Contribution to journalArticle

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Abstract

We have carried out magnetic susceptibility and heat capacity measurements on a typical Haldane antiferromagnet (CH3)4NNi(NO)3 (TMNIN) doped with nonmagnetic Zn2+ ion impurities at the concentrations of 7.4%, 11.8% and 20.4% and on a pure system down to 0.2 K. At low temperatures below 1.2 K, the paramagnetic susceptibility expected in the Haldane system with the open chain is found to be suppressed. A broad maximum of the heat capacity is observed around 0.7 K for each impurity system. The observed results strongly suggest that there exists an antiferromagnetic interaction between the edge S = 1/2 spins adjacent to Zn2+ ions via the next-nearest exchange interaction Jnn which can be regarded as a bond impurity in the Haldane system. This is the first experiment on bond impurity models for the Haldane system.

Original languageEnglish
Pages (from-to)1892-1895
Number of pages4
JournalJournal of the Physical Society of Japan
Volume66
Issue number7
DOIs
Publication statusPublished - 1997

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magnetic properties
impurities
specific heat
magnetic permeability
ions
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Magnetic Properties of an S = 1 Heisenberg Antiferromagnet TMNIN with Bond Impurity. / Kawae, Tatsuya; Ito, Masakazu; Mito, Masaki; Hitaka, Masako; Takeda, Kazuyoshi.

In: Journal of the Physical Society of Japan, Vol. 66, No. 7, 1997, p. 1892-1895.

Research output: Contribution to journalArticle

Kawae, Tatsuya ; Ito, Masakazu ; Mito, Masaki ; Hitaka, Masako ; Takeda, Kazuyoshi. / Magnetic Properties of an S = 1 Heisenberg Antiferromagnet TMNIN with Bond Impurity. In: Journal of the Physical Society of Japan. 1997 ; Vol. 66, No. 7. pp. 1892-1895.
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AU - Hitaka, Masako

AU - Takeda, Kazuyoshi

PY - 1997

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