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The model of metamagnetic phase transition in Mn 3 GaC
Author(s) -
Cofta H.,
Pawlicki P.
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.2221140106
Subject(s) - magnetostriction , condensed matter physics , isotropy , hamiltonian (control theory) , metamagnetism , phase transition , trigonal crystal system , physics , thermodynamics , materials science , chemistry , magnetic field , magnetization , quantum mechanics , mathematics , crystallography , crystal structure , mathematical optimization
A new model of metamagnetic phase transition with temperature in Mn 3 GaC is proposed. The magnetoelastic Hamiltonian takes into account two independent strains (trigonal and isotropic ones) as functions of temperature, calculated similarly to the microscopic theory of magnetostriction. Necessary conditions for the transition are established within the molecular field approximation and the fit with experiment is discussed.