Abstract
We report on structural, magnetic, and GMR properties of permalloy/Au multilayers where permalloy = Ni83 Fe17 , deposited by face-to-face sputtering onto Si(111) substrate. X-ray diffraction studies confirmed a good structural quality of our multilayers. The samples were characterised with vibrating sample magnetometer, longitudinal magnetooptical Kerr effect and giant magnetoresistance measurements. It was determined that our multilayers are magnetically very soft with Ηc 1 Oe and show uniaxial anisotropy with Ηι' 5 Oe. For gold sublayer thickness dΑ close to 1.1 nm the antiferromagnetic coupling is present in very narrow Au thickness range ( ≈ 0.2 nm). Despite a good structural quality of samples relatively small giant magnetoresistance value (1.2% at room temperature) was found. It is due to non-perfect aniferromagnetic coupling caused by pinholes.
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