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Phase diagrams of an Ising magnet with random exchange bonds
Author(s) -
Medvedev M. V.
Publication year - 1978
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.2220860112
Subject(s) - antiferromagnetism , condensed matter physics , ising model , spin glass , ferromagnetism , paramagnetism , phase diagram , magnet , magnetic susceptibility , spin (aerodynamics) , materials science , phase transition , random field , phase (matter) , physics , mathematics , thermodynamics , quantum mechanics , statistics
Abstract In the molecular field approximation it is shown that there are a random ferromagnetic state, a spin‐glass one and a random antiferromagnetic one, in an Ising magnet with random nearest‐neighbour exchange bonds of different signs. The analytical expressions for the transition temperatures from these states into the paramagnetic ones are obtained. The high‐temperature susceptibility of the system and the susceptibility of the spin‐glass state are investigated as well.