The applicability of the sine-Gordon model to the magnetic heat capacity of (C6H11NH3)CuBr3

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Abstract

The field dependence of the heat capacity of (C6H11NH3)CuBr3 has been analysed. The overall behavior for 1.5 K <T <7 K and B <7 kG is confronted with the classical sine-Gordon model. The observed deviations are mainly due to spin-components out of the easy-plane, which tend to cancel the quantum (sine-Gordon) effects in this s=1/2 system.
Original languageEnglish
Pages (from-to)824-826
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume54-57
Issue number2
DOIs
Publication statusPublished - 1986

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