Analytical and numerical studies of the easy-plane antiferromagnetic chain: Application to (CH3)4NMnCl3

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Using both the analytic steepest-descent method and computer-simulation techniques, we investigate the classical easy-magnetization-plane antiferromagnetic chain in a magnetic field. The free energy as well as the static correlation functions are determined analytically by means of a mapping onto the soliton-bearing double anisotropic ferromagnet. The magnetization and the specific heat are calculated numerically, and the results are compared with the analytical findings and with experimental measurements on the linear-chain antiferromagnet (CH3)4NMnCl3 (TMMC). We discuss the soliton contribution to the thermodynamics, static correlation functions, and the switching of hard-magnetization-axis phenomena. Furthermore, the importance of quantum effects in TMMC is considered.

Original languageEnglish
JournalPhysical Review B
Issue number5
Pages (from-to)3240-3250
Number of pages11
Publication statusPublished - 1985
Externally publishedYes

ID: 238392120