Effective-field approximations for disordered magnets
- 14 November 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (21), 4011-4020
- https://doi.org/10.1088/0022-3719/9/21/020
Abstract
Various effective-field approximation schemes are presented for describing the effects of fluctuations due to random spatial disorder on magnetic spin systems. An S=1/2 Ising model Hamiltonian is used, for which the spins occupy sites on a regular lattice but the exchange bonds are taken to be independent random variables. Both ferromagnetic and spin-glass types of ordering are considered. The results of the various approximation schemes are compared and related to previous work on disordered magnets.Keywords
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