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Micromagnetic Theory of Phase Transitions in Inhomogeneous Ferromagnets. II. Applications
Author(s) -
Fähnle M.,
Kronmüller H.
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.2220980121
Subject(s) - condensed matter physics , ferromagnetism , curie temperature , physics , phase transition , inverse , phase (matter) , landau theory , quantum mechanics , mathematics , geometry
The influence is calculated of spatially random fluctuations of the Landau parameters A( r ) and B( r ) as well as the influence of inhomogeneous stress fields on the magnetic behaviour near the phase transition of inhomogeneous ferromagnets. In general this behaviour is determined by fluctuations of the Landau parameter A( r ) , whereas there is only a negligibly small contibution of spatially random fluctuations of B( r ) and of inhomogeneous stress fields. The shifts of the ferromagnetic Curie temperatures due to the fluctuations of A( r ) are of the order of magnitude of 1 to 10%. However, for actual material parameters only small curvatures are derived of the Arrott plots and the inverse paramagnetic susceptibility when considering spatially random fluctuations of A( r ) .