Thermodynamic Properties of the One-Dimensional Ising System (CH3)4 NCo(NO2)3, the Iso-Structural Compound with the Haldane System, TMNIN

Masaki Mito; Masakazu Ito; Tatsuya Kawae; Masako Hitaka; Kazuyoshi Takeda; Hiroyuki Deguchi; Seishi Takagi

doi:10.1143/JPSJ.64.4402

Thermodynamic Properties of the One-Dimensional Ising System (CH₃)₄ NCo(NO₂)₃, the Iso-Structural Compound with the Haldane System, TMNIN

Masaki Mito, Masakazu Ito, Tatsuya Kawae, Masako Hitaka, Kazuyoshi Takeda, Hiroyuki Deguchi, Seishi Takagi

Applied Physics

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4 Citations (Scopus)

Abstract

We measured the magnetic heat capacity, susceptibility and magnetization of (CH₃)₄NCo(NO₂)₃ (TMCON) which is the iso-structural compound with the Haldane compound (CH₃)₄NNi(NO₂)₃ (TMNIN). From the analysis of these thermodynamic properties, we found that TMCON is a one-dimensional S=1/2 Ising system where the ferromagnetic nearest neighbor interaction J₁ and the antiferromagnetic next-nearest neighbor interaction J₂ are competing. The value of J₁ is estimated to be J₁/k_B=28.0±4.0 K. It is confirmed that the results can be comprehensively explained only when we take J₂<0, although J₂=−0.22J₁ estimated from the thermal analysis differs from J₂=−0.46 J₁ from the magnetic susceptibility for the powdered sample. Based on the results for TMCON, we discuss the stabilization of the Haldane state in TMNIN, considering the frustration effect between J₁ and J₂.

Original language	English
Pages (from-to)	4402-4410
Number of pages	9
Journal	journal of the physical society of japan
Volume	64
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.64.4402
Publication status	Published - Nov 1995

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Physics and Astronomy(all)

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title = "Thermodynamic Properties of the One-Dimensional Ising System (CH3)4 NCo(NO2)3, the Iso-Structural Compound with the Haldane System, TMNIN",

abstract = "We measured the magnetic heat capacity, susceptibility and magnetization of (CH3)4NCo(NO2)3 (TMCON) which is the iso-structural compound with the Haldane compound (CH3)4NNi(NO2)3 (TMNIN). From the analysis of these thermodynamic properties, we found that TMCON is a one-dimensional S=1/2 Ising system where the ferromagnetic nearest neighbor interaction J1 and the antiferromagnetic next-nearest neighbor interaction J2 are competing. The value of J1 is estimated to be J1/kB=28.0±4.0 K. It is confirmed that the results can be comprehensively explained only when we take J2<0, although J2=−0.22J1 estimated from the thermal analysis differs from J2=−0.46 J1 from the magnetic susceptibility for the powdered sample. Based on the results for TMCON, we discuss the stabilization of the Haldane state in TMNIN, considering the frustration effect between J1 and J2.",

author = "Masaki Mito and Masakazu Ito and Tatsuya Kawae and Masako Hitaka and Kazuyoshi Takeda and Hiroyuki Deguchi and Seishi Takagi",

year = "1995",

month = nov,

doi = "10.1143/JPSJ.64.4402",

language = "English",

volume = "64",

pages = "4402--4410",

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T1 - Thermodynamic Properties of the One-Dimensional Ising System (CH3)4 NCo(NO2)3, the Iso-Structural Compound with the Haldane System, TMNIN

AU - Mito, Masaki

AU - Ito, Masakazu

AU - Kawae, Tatsuya

AU - Hitaka, Masako

AU - Takeda, Kazuyoshi

AU - Deguchi, Hiroyuki

AU - Takagi, Seishi

PY - 1995/11

Y1 - 1995/11

N2 - We measured the magnetic heat capacity, susceptibility and magnetization of (CH3)4NCo(NO2)3 (TMCON) which is the iso-structural compound with the Haldane compound (CH3)4NNi(NO2)3 (TMNIN). From the analysis of these thermodynamic properties, we found that TMCON is a one-dimensional S=1/2 Ising system where the ferromagnetic nearest neighbor interaction J1 and the antiferromagnetic next-nearest neighbor interaction J2 are competing. The value of J1 is estimated to be J1/kB=28.0±4.0 K. It is confirmed that the results can be comprehensively explained only when we take J2<0, although J2=−0.22J1 estimated from the thermal analysis differs from J2=−0.46 J1 from the magnetic susceptibility for the powdered sample. Based on the results for TMCON, we discuss the stabilization of the Haldane state in TMNIN, considering the frustration effect between J1 and J2.

AB - We measured the magnetic heat capacity, susceptibility and magnetization of (CH3)4NCo(NO2)3 (TMCON) which is the iso-structural compound with the Haldane compound (CH3)4NNi(NO2)3 (TMNIN). From the analysis of these thermodynamic properties, we found that TMCON is a one-dimensional S=1/2 Ising system where the ferromagnetic nearest neighbor interaction J1 and the antiferromagnetic next-nearest neighbor interaction J2 are competing. The value of J1 is estimated to be J1/kB=28.0±4.0 K. It is confirmed that the results can be comprehensively explained only when we take J2<0, although J2=−0.22J1 estimated from the thermal analysis differs from J2=−0.46 J1 from the magnetic susceptibility for the powdered sample. Based on the results for TMCON, we discuss the stabilization of the Haldane state in TMNIN, considering the frustration effect between J1 and J2.

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Thermodynamic Properties of the One-Dimensional Ising System (CH₃)₄ NCo(NO₂)₃, the Iso-Structural Compound with the Haldane System, TMNIN

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