Synthetic Co50Pt50/Ru/CoFe hard-soft trilayer in spin valves

J. J. Qiu*, K. B. Li, G. C. Han, Y. K. Zheng, Zaibing Guo, Y. H. Wu

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    1 Scopus citations

    Abstract

    The influence of deposition power and seedlayer on the properties of hard magnet Co50Pt50 was studied. Co50Pt50(/Co90Fe10)/Ru/Co90Fe10 trilayer was used as pining/pinned layer in spin valves. The influences of different hard layer, soft layer and free layer on exchange bias, interlayer coupling, and magnetoresistance (MR) ratio were studied. Weak antiferromagnetic interlayer coupling was obtained by adjusting the thickness of hard and soft layers. MR of a spin valve with structure Cr2/CoFe0.5/CoPt4/CoFe0.5/Ru0.8/CoFe2.2/Cu2.05/CoFe2.6/Cu1.1/Ta1 reached 10.68% (unit in nm), which is comparable to those of IrMn-based synthetic spin valves. The increment of the coercivity of the free layer is mainly due to the static magnetic interaction between the hard layer and the free layer.

    Original languageEnglish (US)
    JournalJournal of Magnetism and Magnetic Materials
    Volume303
    Issue number2 SPEC. ISS.
    DOIs
    StatePublished - Jan 1 2006

    Keywords

    • Coercivity
    • Exchange bias
    • Hard-soft trilayer
    • Interlayer coupling
    • Spin valve

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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