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Low‐Temperature Properties of One‐Dimensional Heisenberg Systems with Random Anistropy
Author(s) -
Gekht R. S.
Publication year - 1984
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.2221220215
Subject(s) - anisotropy , plane (geometry) , spin (aerodynamics) , heisenberg model , type (biology) , condensed matter physics , physics , mathematics , thermodynamics , quantum mechanics , geometry , ecology , ferromagnetism , biology
Thermodynamic properties of classical one‐dimensional Heisenberg systems with random V (of the “easy axis” type) and regular D (of the “easy plane” type) anisotropies are considered. The expression for the free energy is obtained by the transfer‐integral techniques and by the solution of the Fokker‐Planck equations. Low‐temperature dependences of susceptibility and correlation lengths are found for a random disordered system. The expression for the square of fluctuation of the S z spin component is obtained in dependence on the parameters V , D and temperature T .