Room-temperature tunneling magnetoresistance in La0.7Sr 0.3MnO3 step-edge junctions

L. M. Wang, Chen Chung Liu, H. C. Yang, H. E. Horng

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    La0.7Sr0.3MnO3 (LSMO) step-edge junctions were fabricated on step-edge (001) SrTiO3 substrates. Above room temperature (RT) the step-edge junctions showed vanishing tunneling magnetoresistance (TMR) spikes in R(H) curves. To study the conduction mechanism of polarized electrons accross grain boundaries the MR ratio and the dynamic conduction at various temperatures was measured. The results show that tunneling is the dominating mechanism and the charge carriers at the surface boundary govern the tunneling conductivity.

    Original languageEnglish
    Pages (from-to)4928-4933
    Number of pages6
    JournalJournal of Applied Physics
    Volume95
    Issue number9
    DOIs
    Publication statusPublished - 2004 May 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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