Doping Effect of Non-Magnetic and Magnetic Impurities on Magnetic Susceptibility of the Haldane System (CH3)4NNi(NO2)3

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

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Abstract

Magnetic susceptibility measurement has been carried out on the Haldane system (CH3)4NNi(NO2)3 containing non-magnetic Zn2+ and magnetic Cu2+ impurity ions. For each impure system, magnetic susceptibility is described by the sum of two contributions; one is from the Haldane state and the other is a paramagnetic contribution. The latter contribution increases proportionally with impurity concentration. For 1D system shortened by Zn2+ impurity ions, the paramagnetic contribution obeys the Curie law, and its absolute value of the susceptibility is found to amount nearly 40% of the theoretical estimation for the VBS model where the spin with its value S = 1/2 appears at the both edges of 1D segments. In the case for the system with Cu2+ impurity ions, the paramagnetic contribution is much smaller than the results for the Zn2+ impure systems. This reduction of the magnetic moment of Cu2+ ion for 5 = 1/2 is qualitatively different from the case for the enhanced moment of Cu2+ ion in the anisotropic S = 1 Heisenberg antiferromagnet NENP.

Original languageEnglish
Pages (from-to)2610-2613
Number of pages4
Journaljournal of the physical society of japan
Volume65
Issue number8
DOIs
Publication statusPublished - Jan 1 1996

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magnetic permeability
impurities
ions
magnetic moments
moments

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Doping Effect of Non-Magnetic and Magnetic Impurities on Magnetic Susceptibility of the Haldane System (CH3)4NNi(NO2)3. / Ito, Masakazu; Mito, Masaki; Kawae, Tatsuya; Hitaka, Masako; Takeda, Kazuyoshi.

In: journal of the physical society of japan, Vol. 65, No. 8, 01.01.1996, p. 2610-2613.

Research output: Contribution to journalArticle

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abstract = "Magnetic susceptibility measurement has been carried out on the Haldane system (CH3)4NNi(NO2)3 containing non-magnetic Zn2+ and magnetic Cu2+ impurity ions. For each impure system, magnetic susceptibility is described by the sum of two contributions; one is from the Haldane state and the other is a paramagnetic contribution. The latter contribution increases proportionally with impurity concentration. For 1D system shortened by Zn2+ impurity ions, the paramagnetic contribution obeys the Curie law, and its absolute value of the susceptibility is found to amount nearly 40{\%} of the theoretical estimation for the VBS model where the spin with its value S = 1/2 appears at the both edges of 1D segments. In the case for the system with Cu2+ impurity ions, the paramagnetic contribution is much smaller than the results for the Zn2+ impure systems. This reduction of the magnetic moment of Cu2+ ion for 5 = 1/2 is qualitatively different from the case for the enhanced moment of Cu2+ ion in the anisotropic S = 1 Heisenberg antiferromagnet NENP.",
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AU - Takeda, Kazuyoshi

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AB - Magnetic susceptibility measurement has been carried out on the Haldane system (CH3)4NNi(NO2)3 containing non-magnetic Zn2+ and magnetic Cu2+ impurity ions. For each impure system, magnetic susceptibility is described by the sum of two contributions; one is from the Haldane state and the other is a paramagnetic contribution. The latter contribution increases proportionally with impurity concentration. For 1D system shortened by Zn2+ impurity ions, the paramagnetic contribution obeys the Curie law, and its absolute value of the susceptibility is found to amount nearly 40% of the theoretical estimation for the VBS model where the spin with its value S = 1/2 appears at the both edges of 1D segments. In the case for the system with Cu2+ impurity ions, the paramagnetic contribution is much smaller than the results for the Zn2+ impure systems. This reduction of the magnetic moment of Cu2+ ion for 5 = 1/2 is qualitatively different from the case for the enhanced moment of Cu2+ ion in the anisotropic S = 1 Heisenberg antiferromagnet NENP.

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