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Oscillatory exchange coupling of ferromagnetically aligned Fe(110) layers through Ag(111) interlayers.

The interlayer exchange coupling in Fe(110)/Ag(111) multilayer structures with parallel alignment of the Fe layer,magnetizations has been investigated with a zero-field Mossbauer spectroscopy technique that is sensitive only to the spin-wave spectrum at the Fe/Ag interface. Model spin-wave calculations are presented to connect the coupling strength to the observed interfacial spin-wave behavior. As the Ag thickness was varied from 0 to 40 ML (monolayers), the interfacial spectra of the films showed oscillations in the coupling strength with a period of 6 ML, in close agreement with recent predictions