The magnetism of ferromagnetic metal/ferromagnetic semiconductor PbS/EuS/Fe/PbS thin films has been studied. The presence of antiferromagnetic alignment of neighboring ferromagnetic layers in direct contact with each other was observed. The films also showed an exchange bias effect which appeared due to the formation (likely during film deposition) of antiferromagnetic FeS at the Fe/PbS interface. Antiferromagnetic interfacial exchange coupling between Fe and FeS was also observed. It was shown that the exchange anisotropy could be controlled by the remnant state of Fe magnetization during the cooling process, that in turn could be tuned by an external cooling field. The influence of exchange anisotropy and exchange coupling effects on the field and temperature dependencies of the film magnetization was examined.
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Volobuev et al. (2010) studied this question.
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