Giant magnetoresistance and low saturation fields in Co-Fe/Cu multilayers

K. Inomata, Y. Saito

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37 Citations (Scopus)


We have investigated the magnetoresistive properties of CoxFe1-x/Cu multilayers with different CoxFe1-x and Cu thicknesses, prepared on MgO(110) substrates using ion beam sputtering. The MR ratio for Co9Fe/Cu multilayers was significantly larger than that for Co/Cu multilayers. The MR ratio oscillates for Cu layer thickness with a 12 Å period for all the multilayers investigated. The Cu intervening magnetic layer coupling depends on the Co concentration and has a broad maximum around x = 0.8. The uniaxial anisotropy induced by epitaxial growth in the multilayers on MgO(110) substrates led to a low saturation field and quite a small field change ΔH needed for giant magnetoresistance. An MR ratio of 16% was attained for ΔH = 50 Oe at room temperature.

Original languageEnglish
Pages (from-to)425-429
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3
Publication statusPublished - 1993 Sept


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