Magnetic specific heat of the nearly-one-dimensional system tetramethyl ammonium nickel trichloride (TMNC)

1 May 1976

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 13 (9) , 3953-3955
https://doi.org/10.1103/physrevb.13.3953

Abstract

The specific heat of tetramethyl ammonium nickel trichloride (TMNC) for

3.5 < T < 20

K has been analyzed using the scaled lattice contribution of the isomorphic cadmium and manganese compounds and a magnetic contribution represented by the Hamiltonian

H = - 2 J Σ_{i} {\vec{S}}_{i} \cdot {\vec{S}}_{i + 1} - D Σ_{i} [S_{iz}^{2} - \frac{S (S + 1)}{3}]

. The resulting parameter values

\frac{J}{k} = + 1.7 \pm 0.3

K, and

\frac{D}{k} = - 3.3 \pm 0.5

K are qualitatively in agreement with the results from susceptibility measurements.

Keywords

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