MAGNETOSTRICTION OF FE GD MULTILAYERS

Using strain-modulated ferromagnetic resonance method we have measured the magnetostriction constant lambda(2) of Fe/Gd multilayers deposite d using rf and de sputtering. For the samples deposited using rf sputt ering the contribution to the effective magnetostriction due to the in terdiffusion layers has been observed. Samples grown using de sputteri ng are characterized by sharp interfaces with no indication of interdi ffusion. In this case the magnetostriction consists of two components: one due to the bulk magnetostriction and another due to the intrinsic surface magnetostriction.