Monte Carlo study of the Ni(C 5H 5N) 2Ni(CN) 4-2d compound

Assuming that the material Ni(C 5H 5N) 2Ni(CN) 4 has a strong easy-plane anisotropy, we use a two-dimensional biquadratic planar rotator model to describe its thermodynamical behavior. Using an exchange coupling, J/k B =0.8 K and a biquadratic parameter D/k B =0.15 K, we have performed Monte Carlo s...

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Bibliographic Details
Published in:Solid state communications 2002, Vol.123 (5), p.201-204
Main Authors: Leonel, S.A, Coura, P.Z, Costa, B.V, Pires, A.S.T
Format: Article
Language:English
Subjects:
A. Magnetic materials
Classical spin models
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Critical-point effects, specific heats, short-range order
D. Easy-plane anisotropy
Exact sciences and technology
General theory and models of magnetic ordering
Magnetic properties and materials
Numerical simulation studies
Physics
Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
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Summary:Assuming that the material Ni(C 5H 5N) 2Ni(CN) 4 has a strong easy-plane anisotropy, we use a two-dimensional biquadratic planar rotator model to describe its thermodynamical behavior. Using an exchange coupling, J/k B =0.8 K and a biquadratic parameter D/k B =0.15 K, we have performed Monte Carlo simulations obtaining a good agreement with experimental data for the specific heat. Also, we have estimated the Berezinskii–Kosterlitz–Thouless (BKT) temperature as T BKT≈0.72 K and calculated the magnetic susceptibility.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(02)00288-0