Abstract
We have performed the calculations of giant magnetoresistance (GMR) versus the thickness of ferromagnetic and/or non-magnetic layers in NiFe/Cu/NiFe and/or Co/Cu/Co sandwiched structures in both cases: (1) interfacial spin-dependent scattering only; (2) the presence of both interfacial and bulk spin-dependent scattering. The results show that, in the presence of both interfacial and bulk spin-dependent scattering, the dependence of the calculated GMR on ferromagnetic and/or non-magnetic thickness is consistent with the experimental results. The comparison of the calculated results in both cases demonstrates the importance of bulk spin-dependent scattering in Co/Cu and/or NiFe/Cu systems. Furthermore, the calculations indicate that the ferromagnetic thickness corresponding to the GMR maximum increases with the increase of the thickness of non-magnetic layer in NiFe/Cu/NiFe and/or Co/Cu/Co sandwiches.
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