Spin-dependent tunneling through NiFe nanoparticles

K. J. Dempsey, A. T. Hindmarch, C. H. Marrows, H. X. Wei, Q. H. Qin, Z. C. Wen, X. F. Han

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Double magnetic tunnel junctions (DMTJs) have been fabricated using alumina barriers with NiFe particles (∼1.8 nm) embedded within. The junctions exhibit spin-dependent transport properties and Coulomb blockade effects. We study differences between control samples and the DMTJs; specifically I-V characteristics and tunnel magnetoresistance (TMR) versus bias voltage characteristics. Clear differences in the systems are evident: the DMTJ with NiFe particles shows a marked peak in TMR at low bias, whereas the dependence of TMR on bias is much weaker for the control MTJ without embedded particles. Hence the TMR at low bias is enhanced by the Coulomb blockade effects.

    Original languageEnglish
    Article number07C923
    JournalJournal of Applied Physics
    Issue number7
    Publication statusPublished - 2009

    ASJC Scopus subject areas

    • Physics and Astronomy(all)


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