Transfer-Matrix Simulations of Linear Magnetic Systems
R. Matysiaka, A. Caramico D'Auriab, F. Espositob and U. Espositob
a Computational Physics Division, Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
b Dipartimento di Scienze Fisiche, Università di Napoli, Piazzale Tecchio, 80125 Napoli, and INFM Unità di Napoli, Italy
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The quantum transfer-matrix method was applied to study the finite-temperature static properties of the spin S=1 antiferromagnetic Heisenberg chains in a wide range of the single-ion anisotropy and temperatures. The high-resolution quantum transfer-matrix simulation data are obtained for the zero-field susceptibility, specific heat as well as for the field-dependent magnetization. The microscopic parameters of a number of real quasi-one-dimensional compounds are found from fitting procedures, some theoretical approaches are numerically verified and an extension of the technique to a non-uniform bond alternating molecular magnets is also put forward.
DOI: 10.12693/APhysPolA.97.959
PACS numbers: 75.10.Jm, 75.40.Cx, 75.40.Mg