Abstract
An outstanding question regarding magnetic systems is which type of interaction, i.e., ferromagnetic or antiferromagnetic, dominates the interfacial exchange coupling. Here we report magnetic properties of a ferromagnet (FM)-spin glasses (SG) system above the freezing temperature TF = 10.3 K of SG. Our experimental results demonstrate that the effective interfacial exchange coupling in FM-SG system could be either parallel or antiparallel depending on the cooling magnetic field. The compensation cooling magnetic field, which leads to zero effective interfacial exchange coupling and in which the effective interfacial exchange coupling changes sign, is determined. This work opens up many avenues toward the study of SG and the interfacial exchange coupling.
Published Version
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