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

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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 languageEnglish
Pages (from-to)2917-2920
Number of pages4
Journaljournal of the physical society of japan
Volume74
Issue number11
DOIs
Publication statusPublished - Nov 1 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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