Premium
Constant Coupling Approximation for Amorphous Magnets
Author(s) -
Kobe S.,
Handrich K.
Publication year - 1972
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.2220540230
Subject(s) - curie temperature , condensed matter physics , constant (computer programming) , amorphous solid , coupling constant , coupling (piping) , ising model , physics , magnet , ferromagnetism , heisenberg model , curie , thermodynamics , materials science , mathematical physics , quantum mechanics , chemistry , computer science , metallurgy , programming language , organic chemistry
The constant coupling approximation is used to determine the critical temperatures of amorphous ferro‐ and antiferromagnets, for both the Heisenberg and Ising model. Due to the structure fluctuations of the exchange integrals a decrease of the Curie temperature and the Néel temperature, respectively, are found in comparison with the corresponding crystalline case. This result agrees qualitatively with results of both the Green's function and the high‐temperature expansion treatments.