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Spin Glass of the Site‐Random Ising Model with First and Second Neighbor Interactions
Author(s) -
Katsura S.,
Konishi K.
Publication year - 1982
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.2221120205
Subject(s) - antiferromagnetism , spin glass , ising model , condensed matter physics , k nearest neighbors algorithm , ferromagnetism , spin (aerodynamics) , frustration , physics , ising spin , curie temperature , phase transition , chemistry , thermodynamics , artificial intelligence , computer science
The site‐random Ising mixture of atoms A and B, of which the first and second neighbor interaction energies are J 1AA . J 1BB , J 1AB J 2AA J 2BB , J 2AB , is considered. The second neighbor interactions are treated along the line of Hüller. For the mixtures where J 1AA > 0 (ferromagnetic) and J 1BB < 0 (antiferromagnetic), the Curie, Néel, and spin glass transition temperatures are calculated and the phase diagrams are obtained. The severe situation for the appearance of the spin glass state in the site‐random Ising model with only first neighbor interactions (possible region of J 1AA , J 1BB , and J 1AB for the spin glass is very narrow) is much improved by the introduction of the proper choice of the second neighbor interactions which enhances the frustration.