Spin glass transition in canonical AuFe alloys: A numerical study

Although spin glass transitions have long been observed in diluted magnetic alloys, e.g. AuFe and CuMn alloys, previous numerical studies are not completely consistent with the experiment results. The abnormal critical exponents of the alloys remain still puzzling. By employing parallel tempering algorithm with finite-size scaling analysis, we investigated the phase transitions in canonical AuFe alloys. Our results strongly support that spin glass transitions occur at finite temperatures in the alloys. The calculated critical exponents agree well with those obtained from experiments.

► By simulation we investigated the abnormal critical exponents observed in canonical SG alloys.
► The critical exponents obtained from our simulations agree well with those measured from experiments.
► Our results strongly support that RKKY interactions lead to SG transitions at finite temperatures.