Abstract
Tb/Fe multilayers have been deposited by rf-sputtering in order to study the influence of the stack parameters on their magneto-optical properties. Films with fixed terbium thickness, fixed iron thickness or fixed thickness ratio have been characterized by grazing X-ray reflection, Kerr magneto-optical and conversion electron Mössbauer measurements. Samples exhibit a magnetic anisotropy depending on the thickness ratio ρ Tb/ρ Fe and varying continuously from an in-plane to a perpendicular configuration with it. Perfectly square hysteresis loops are obtained for 0.6<ρ Tb/ρ Fe<1.1. Coercivity H c is found to be in the 0.7–5 kOe range and varying with ρ Tb/ρ Fe. A reversal of the hysteresis loops indicates that some samples have their compensation temperature below the room temperature. Iron layers are amorphous.
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