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)

Abstract

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
Volume105
Issue number7
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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