Abstract
Magnetic multilayers [Fe(20 \AA{})/Pd(x \AA{})${]}_{25}$ grown by electron-beam evaporation in high vacuum were studied by x-ray-diffraction, superconducting quantum interference device, vibrating-sample-magnetometer, magnetoresistance, and conversion-electron-M\"ossbauer-spectra measurements. From x-ray-diffraction measurements a structure transition of Fe layers from bcc to fcc was observed if the thickness of Pd layers was over 36 \AA{}. An oscillatory behavior of saturation magnetization per unit Fe volume was found with increment of thickness of Pd layer in the range of 6 to 60 \AA{}. Conversion-electron-M\"ossbauer-spectra measurements proved that the moment of Fe atoms in Fe/Pd multilayers is almost the same as for a single Fe film and the oscillatory magnetization is caused by the magnetic-polarization effect of the Pd layers. An antiferromagnetic coupling between the polarization moments in the Pd layer could clearly be observed in a special Pd thickness range, and it might make the magnetization oscillate with the Pd layer thickness. No antiferromagnetic coupling between two Fe layers and the giant magnetoresistance effect were observed. The relationship among structure, interlayer coupling, and the magnetic-polarization effect of Pd layers was discussed.
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