THE PROGRESS OF SPIN GLASS STATE STUDIES FROM 1972-2010
HABTE DULLA BERRY *
Department of Physics, Dilla University, College of Natural and Computational Sciences, P.O.Box 419, Dilla, Ethiopia.
*Author to whom correspondence should be addressed.
In this paper the author reviews research progresses on spin glass state starting from the first experimental finding of spin glass state. Spin glasses are systems with localized electronic magnetic moments whose interactions are characterized by quenched randomness: a given pair of localized moments (`spins' for short) has a roughly equal priori probability of having a ferromagnetic or an antiferromagnetic interaction. The prototype material is a dilute magnetic alloy, with a small amount of magnetic impurity randomly substituted into the lattice of a nonmagnetic metallic host; for example, CuMn or AuFe. The experimental findings about spin glass state has been explained theoretically by Edwards and Anderson (EA) in 1975 then different researchers tried to develop different theories . Mainly their theoretical explanation was based on overlap order parameter.
Keywords: Spin glass;, overlap order parameter, SK model, Binder parameter, critical temperature