Magnetic proximity effects for Fe films across a thin Ag barrier

Abstract
Multilayer (56Fe/57Fe/Ag/56Fe) films were prepared by a high vacuum evaporation technique. Magnetic proximity effects for Fe films across a thin Ag barrier were studied by Mössbauer spectroscopy using 57Fe as a probe. The hyperfine field of 57Fe increases with the increase in thickness of the Ag barrier layer. We believe the proximity effects result from the RKKY interaction, mediated by the sp electrons of Ag.

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