Abstract
Perpendicular magnetic anisotropy of Fe/Tb multilayers was investigated using Mössbauer effect spectroscopy. Twenty-four multilayered Fe/Tb samples were prepared by planar magnetron sputtering. Results of Mössbauer effect measurements show that Fe/Tb multilayers display perpendicular magnetic anisotropy if the Tb layer thickness is less than 12 Å, and display in-plane anisotropy if the Tb layer thickness is more than 12 Å. Results indicate that the interface between Tb and Fe layers is the cause of the perpendicular anisotropy. Results also suggest that this perpendicular anisotropy is not induced due to the growth processes or the stress at the interface between the sample and the substrate.
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