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The Generalized Curie‐Weiss Law
Author(s) -
Fähnle M.,
Souletie J.
Publication year - 1986
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.2221380119
Subject(s) - exponent , condensed matter physics , power law , percolation (cognitive psychology) , curie–weiss law , scaling , critical exponent , spin glass , ferromagnetism , physics , zero (linguistics) , law , curie temperature , mathematical physics , mathematics , phase transition , philosophy , political science , geometry , statistics , linguistics , neuroscience , biology
It is shown that the zero‐field suscetpibility χ of many ferromagnets may be described with high accuracy by a modified power law (generalized Curie‐Weiss law) χ T ∼ [( T – T C )/ T ] −γc in the whole paramagnetic regime, where γ c is the critical susceptibility exponent. In contrast, the conventional power law χ T C ∼ [( T – T C )/ T C ] −γc holds only for the very small critical regime. Application of the scaling variable ( T – T C )/ T , which is non‐linear in T , to other physical situations (spin glasses, percolation) is discussed. Altogether the temperature range where scaling ideas are useful appears to be much wider than generally expected.