Specific heat of nearly-one-dimensional tetramethyl ammonium manganese trichloride (TMMC) and tetramethyl ammonium cadmium trichloride (TMCC)

W.J.M. De Jonge, C.H.W. Swüste, K. Kopinga, K. Takeda

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Abstract

The specific heat of tetramethyl ammonium manganese trichloride and its cadmium isomorph is measured for 2<T<52 K. The temperature dependence of the lattice specific heat of the cadmium compound could be fitted with an expression based upon a pseudoelastic approach of the lattice vibrations in this low-dimensional system. Application of this approach to the manganese compound yields a magnetic contribution which fits the overall behavior of a one-dimensional Heisenberg model with an intrachain interaction of Jk=-6.70.5 K. Inspection of the low-temperature region yields a satisfactory agreement with the expression Cm=1.1|kTJ|+0.5|kTJ|2-0.13|kTJ|3, predicted by recent calculations.

Original languageEnglish
Pages (from-to)5858-5863
Number of pages6
JournalPhysical Review B
Volume12
Issue number12
DOIs
Publication statusPublished - 1 Jan 1975

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