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Reaction field approximation for the ordered phase of heisenberg systems
Author(s) -
Gusmão M. A.,
Scherer C.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220920232
Subject(s) - heisenberg model , paramagnetism , cover (algebra) , anisotropy , condensed matter physics , spin (aerodynamics) , random phase approximation , phase (matter) , coherent potential approximation , field (mathematics) , physics , muffin tin approximation , quantum mechanics , mathematics , linear approximation , electronic structure , ferromagnetism , pure mathematics , thermodynamics , mechanical engineering , engineering , nonlinear system
The approximation method to obtain the static properties of a system of interacting localized magnetic moments, called “reaction field approximation” (RFA), which is previously used for the paramagnetic phase, is extended to cover the ordered phase of a spin system with Heisenberg interaction. The presence of a small anisotropy is also considered and an application to MnF 2 is made.
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