A magnetic cluster model for spin glasses

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Abstract
A model for spin glasses is proposed in which spins whose RKKY interactions exceed thermal energies define magnetic clusters. Percolation theory determines the spin glass temperature Tg below which an infinite cluster forms. With suitable anisotropy assumptions the infinite cluster will be superparamagnetically blocked, giving a cusped susceptibility at Tg. A collinear distribution in each cluster gives an effectively one-dimensional internal field at low temperatures. The model predicts Blandin-Souletie scaling at all temperatures and a T-1 specific heat tail.