Specific heat study of novel spin-gapped system: (CH3) 2NH2CuCl3

Yasuo Yoshida; Osamu Wada; Yuji Inagaki; Takayuki Asano; Kenji Takeo; Tatsuya Kawae; Kazuyoshi Takeda; Yoshitami Ajiro

doi:10.1143/JPSJ.74.2917

Specific heat study of novel spin-gapped system: (CH₃) ₂NH₂CuCl₃

Yasuo Yoshida, Osamu Wada, Yuji Inagaki, Takayuki Asano, Kenji Takeo, Tatsuya Kawae, Kazuyoshi Takeda, Yoshitami Ajiro

Applied Physics

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Specific heat measurements in a magnetic field up to 8 T have been performed on an S = 1/2 weakly coupled alternating ferromagnetic (F) and antiferromagnetic (AF) dimer chain system, (CH₃)₂NH ₂-CuCl₃. We have observed a spontaneous AF ordering and a field-induced one below and above the 1/2 magnetization plateau field range from 2 to 3.5 T, respectively. The H-T phase boundaries for the orderings are completely different from the general reentrant ones of the other quantum spin systems investigated thus far. In the plateau field range, a double-peaked structure is observed in the temperature dependence of specific heat, reflecting the coexistence of F and AF excitations.

Original language	English
Pages (from-to)	2917-2920
Number of pages	4
Journal	journal of the physical society of japan
Volume	74
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.74.2917
Publication status	Published - Nov 2005

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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title = "Specific heat study of novel spin-gapped system: (CH3) 2NH2CuCl3",

abstract = "Specific heat measurements in a magnetic field up to 8 T have been performed on an S = 1/2 weakly coupled alternating ferromagnetic (F) and antiferromagnetic (AF) dimer chain system, (CH3)2NH 2-CuCl3. We have observed a spontaneous AF ordering and a field-induced one below and above the 1/2 magnetization plateau field range from 2 to 3.5 T, respectively. The H-T phase boundaries for the orderings are completely different from the general reentrant ones of the other quantum spin systems investigated thus far. In the plateau field range, a double-peaked structure is observed in the temperature dependence of specific heat, reflecting the coexistence of F and AF excitations.",

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T2 - (CH3) 2NH2CuCl3

AU - Yoshida, Yasuo

AU - Wada, Osamu

AU - Inagaki, Yuji

AU - Asano, Takayuki

AU - Takeo, Kenji

AU - Kawae, Tatsuya

AU - Takeda, Kazuyoshi

AU - Ajiro, Yoshitami

PY - 2005/11

Y1 - 2005/11

N2 - Specific heat measurements in a magnetic field up to 8 T have been performed on an S = 1/2 weakly coupled alternating ferromagnetic (F) and antiferromagnetic (AF) dimer chain system, (CH3)2NH 2-CuCl3. We have observed a spontaneous AF ordering and a field-induced one below and above the 1/2 magnetization plateau field range from 2 to 3.5 T, respectively. The H-T phase boundaries for the orderings are completely different from the general reentrant ones of the other quantum spin systems investigated thus far. In the plateau field range, a double-peaked structure is observed in the temperature dependence of specific heat, reflecting the coexistence of F and AF excitations.

AB - Specific heat measurements in a magnetic field up to 8 T have been performed on an S = 1/2 weakly coupled alternating ferromagnetic (F) and antiferromagnetic (AF) dimer chain system, (CH3)2NH 2-CuCl3. We have observed a spontaneous AF ordering and a field-induced one below and above the 1/2 magnetization plateau field range from 2 to 3.5 T, respectively. The H-T phase boundaries for the orderings are completely different from the general reentrant ones of the other quantum spin systems investigated thus far. In the plateau field range, a double-peaked structure is observed in the temperature dependence of specific heat, reflecting the coexistence of F and AF excitations.

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Specific heat study of novel spin-gapped system: (CH₃) ₂NH₂CuCl₃

Abstract

All Science Journal Classification (ASJC) codes

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