Magnetic properties of Haldane system TMNIN of finite chain length

Tatsuya Kawae; M. Ito; M. Mito; M. Hitaka; K. Takeda

doi:10.1007/BF02570959

Magnetic properties of Haldane system TMNIN of finite chain length

Tatsuya Kawae, M. Ito, M. Mito, M. Hitaka, K. Takeda

Applied Physics

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Abstract

We have studied magnetic properties ofa Haldane system antiferromagnet (CH₃)₄NNi(NO)₃ (TMNIN) diluted with nonmagnetic impurity Zn ²⁺ ions for the concentration, 7.0 %, 11.4 % and 20.4 % as well as non-diluted system. The susceptibility shows the Curie-law attributed to the edge spins of one-dimensional chain down to 1 K with tile Curie constant of 40 % of that expected of the free spin in the case of the VBS model. At lower temperature than 1 K, however, the paramagnetic contribution is found to be suppressed for the higher concentrations. In the heat capacity measurements: a small bump is observed around 0.6 K. The present results suggest the existence of the magnetic interaction between the edge spins via Zn ²⁺ ions or between the edge spins within 1D chain.

Original language	English
Pages (from-to)	1935-1936
Number of pages	2
Journal	Czechoslovak Journal of Physics
Volume	46
Issue number	SUPPL. 4
DOIs	https://doi.org/10.1007/BF02570959
Publication status	Published - Dec 1 1996

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Physics and Astronomy(all)

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10.1007/BF02570959

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title = "Magnetic properties of Haldane system TMNIN of finite chain length",

abstract = "We have studied magnetic properties ofa Haldane system antiferromagnet (CH3)4NNi(NO)3 (TMNIN) diluted with nonmagnetic impurity Zn 2+ ions for the concentration, 7.0 %, 11.4 % and 20.4 % as well as non-diluted system. The susceptibility shows the Curie-law attributed to the edge spins of one-dimensional chain down to 1 K with tile Curie constant of 40 % of that expected of the free spin in the case of the VBS model. At lower temperature than 1 K, however, the paramagnetic contribution is found to be suppressed for the higher concentrations. In the heat capacity measurements: a small bump is observed around 0.6 K. The present results suggest the existence of the magnetic interaction between the edge spins via Zn 2+ ions or between the edge spins within 1D chain.",

author = "Tatsuya Kawae and M. Ito and M. Mito and M. Hitaka and K. Takeda",

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T1 - Magnetic properties of Haldane system TMNIN of finite chain length

AU - Kawae, Tatsuya

AU - Ito, M.

AU - Mito, M.

AU - Hitaka, M.

AU - Takeda, K.

PY - 1996/12/1

Y1 - 1996/12/1

N2 - We have studied magnetic properties ofa Haldane system antiferromagnet (CH3)4NNi(NO)3 (TMNIN) diluted with nonmagnetic impurity Zn 2+ ions for the concentration, 7.0 %, 11.4 % and 20.4 % as well as non-diluted system. The susceptibility shows the Curie-law attributed to the edge spins of one-dimensional chain down to 1 K with tile Curie constant of 40 % of that expected of the free spin in the case of the VBS model. At lower temperature than 1 K, however, the paramagnetic contribution is found to be suppressed for the higher concentrations. In the heat capacity measurements: a small bump is observed around 0.6 K. The present results suggest the existence of the magnetic interaction between the edge spins via Zn 2+ ions or between the edge spins within 1D chain.

AB - We have studied magnetic properties ofa Haldane system antiferromagnet (CH3)4NNi(NO)3 (TMNIN) diluted with nonmagnetic impurity Zn 2+ ions for the concentration, 7.0 %, 11.4 % and 20.4 % as well as non-diluted system. The susceptibility shows the Curie-law attributed to the edge spins of one-dimensional chain down to 1 K with tile Curie constant of 40 % of that expected of the free spin in the case of the VBS model. At lower temperature than 1 K, however, the paramagnetic contribution is found to be suppressed for the higher concentrations. In the heat capacity measurements: a small bump is observed around 0.6 K. The present results suggest the existence of the magnetic interaction between the edge spins via Zn 2+ ions or between the edge spins within 1D chain.

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Magnetic properties of Haldane system TMNIN of finite chain length

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