Abstract
Ferromagnetic interlayer coupling through a semiconducting spacerhas been studied in epitaxial layered structuresFe/EuS/Fe(001). The coupling strength has been determinedas a function of temperature and interlayer thickness usingmagneto-optical Kerr effect magnetometry. A strong rise of thecoupling strength with increasing temperature has been observedin the temperature range, where EuS is paramagnetic. Theobservations match the theoretical description of interlayerexchange coupling between two metallic layers mediated by theelectronic states in a semiconductor. Near the Curie temperatureof EuS, long-range ferromagnetic coupling is observed,that is related to ferromagnetic order inside the EuSlayer.
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