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New Model Exhibiting Metamagnetic Transitions in Absence of Magnetic Field
Author(s) -
Onyszkiewicz Z.
Publication year - 1980
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.2221000131
Subject(s) - condensed matter physics , ferromagnetism , spins , antiferromagnetism , hamiltonian (control theory) , physics , anisotropy , magnetic field , heisenberg model , phase transition , magnetic anisotropy , quantum mechanics , magnetization , mathematics , mathematical optimization
A new model is discussed, defined through a Hamiltonian with anisotropic fourth order terms in spins. It turns out that such a term when added to the ferromagnetic Heisenberg coupling, stabilizes the antiferromagnetic phase at low temperatures. With increasing temperature the meta‐magnetic transition to the ferromagnetic state occurs even when the external magnetic field is absent.