Premium
Discussion of the Ferromagnetic Simple Cubic Ising Lattice with Fluctuating Exchange Integral ( s = 1/2)
Author(s) -
Mielnicki J.,
Balcerzak T.,
Wiatrowski G.
Publication year - 1990
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.2221610134
Subject(s) - simple cubic lattice , ferromagnetism , cubic crystal system , decoupling (probability) , simple (philosophy) , condensed matter physics , ising model , lattice (music) , physics , statistical physics , exchange interaction , mathematics , monte carlo method , statistics , philosophy , engineering , epistemology , control engineering , acoustics
Some magnetic properties of simple‐cubic disordered ferromagnets with fluctuating exchange integral are investigated with the use of the 1‐st, 2‐nd, and 3‐rd Matsudaira approximations. The results of various approximations are similar only for small fluctuations. For large fluctuations significant differences appear. This indicates that for a proper description of disordered material besides the simple decoupling of correlation functions, also another commonly used approximations should be significantly improved.