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Phase Diagram for the Ising Model with a Free Surface
Author(s) -
Honmura R.,
Sarmento E. F.,
Fittipaldi I. P.,
Kaneyoshi T.
Publication year - 1984
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.2221210120
Subject(s) - ising model , phase diagram , formalism (music) , statistical physics , condensed matter physics , ferromagnetism , diagram , simple (philosophy) , physics , theoretical physics , phase (matter) , mathematics , quantum mechanics , statistics , art , musical , visual arts , philosophy , epistemology
The phase diagrams that occur in a semi‐infinite ferromagnetic Ising model with enhanced surface couplings are studied by means of a new‐type of effective‐field theory. A considerable qualitative and to a certain extent quantitative improvement on the traditional mean field phase diagram is obtained. The results obtained by using such a simple formalism are also in good agreement with more sophisticated techniques.