[Cu/{Fe-Mn/M/Cu/M}] N spin-valve multilayers (M=Ni-Fe-Co, Ni-Co, Co-Fe) were prepared by RF sputtering. The multilayers showed a considerably large magnetoresistance (MR) ratio (∼5%) at RT with a small transient field (≤30 Oe). The MR ratio increased with the repetition number N, whereas the MR ratio of Fe-Mn-capped multilayers such as Fe-Mn/[Ni-Fe-Co/Cu] N decreased with N, and the value was smaller than that of [Ni-Fe-Co/Cu] N or spin-valve multilayers [Cu/{Fe-Mn/Ni-Fe-Co/Cu/Ni-Fe-Co}] N .
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Sakakima et al. (1993) studied this question.
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