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Vacancy Migration in the Kagomé Ising Ferromagnet
Author(s) -
Khatun M.,
Emert J. W.
Publication year - 1999
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/(sici)1521-3951(199907)214:1<11::aid-pssb11>3.0.co;2-t
Subject(s) - ising model , ferromagnetism , condensed matter physics , enthalpy , vacancy defect , entropy (arrow of time) , physics , thermodynamics , materials science
We report a theoretical study of the temperature‐dependent magnetic contributions to the free enthalpy, entropy, and enthalpy of vacancy migration for a kagomé ferromagnetic Ising system. The a priori knowledge of the exact solutions of spin correlations for the perfect kagomé structure enables us to determine the thermodynamic functions at all temperatures. The entropy and enthalpy diverge at the critical temperature T c , whereas the free enthalpy shows rapid change around the critical temperature and remains finite up to very high temperatures.