High-pressure torsion for production of magnetoresistance in Cu-Co alloy

Kenichiro Suehiro, Shunichi Nishimura, Zenji Horita, Seiji Mitani, Koki Takanashi, Hiroyasu Fujimori

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    23 Citations (Scopus)


    The process of high-pressure torsion (HPT) was applied to control the size and distribution of ferromagnetic Co particles in a Cu-Co alloy. Electron probe microanalysis, X-ray diffraction analysis, and transmission electron microscopy confirmed that the Co particles were significantly refined through fragmentation and dissolved with intense straining by HPT. Magnetoresistance appeared by ~2.5% at 77 K with an isotropic feature corresponding to giant magnetoresistance (GMR). It is demonstrated that HPT is a potential process for creating GMR in the Cu-Co alloy prepared by conventional ingot metallurgy.

    Original languageEnglish
    Pages (from-to)7349-7353
    Number of pages5
    JournalJournal of Materials Science
    Issue number23-24
    Publication statusPublished - Dec 2008

    All Science Journal Classification (ASJC) codes

    • General Materials Science
    • Mechanics of Materials
    • Mechanical Engineering


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