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Abstract : We define the concentration range where a dilute alloy of transition impurities in a noble matrix is a spin glass, by the possibility of representing its properties through universal functions of the T-c and H-c variables. The susceptibility of a spin glass contains one reversible part χr which shows a sharp peak at a temperature TM ~ c. This sharp peak is due to the presence of a remanent magnetization which appears when T < TM. The remanent magnetization of a spin glass is represented by an universal curve in the reduced diagram σr = f T-c. Its properties are like those of the remanent magnetization of monodomains. We interpret it by supposing that at T



Autor: J. Tholence R. Tournier

Fuente: https://hal.archives-ouvertes.fr/



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