Magnetic tunnel junctions with L1 0-ordered FePt alloy electrodes

T. Moriyama, S. Mitani, Takeshi Seki, T. Shima, Koki Takanashi, Akimasa Sakuma

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27 Citations (Scopus)

Abstract

The magnetotransport properties and the structure of the magnetic tunnel junctions (MTJ) with L1 0-ordered FePt alloy electrodes were investigated. The MTJs were synthesized on the MgO(110) single crystal substrates. The structural characteristics of the MTJs were analyzed using x-ray diffraction, reflection high-energy electron diffraction and atomic force microscopy. The tunnel magnetoresistance (TMR) of MTJs was found to be 34% at 77 K with FePt alloy electrodes in which the degree of chemical order, S, was estimated to be ∼ to be 0.7. It was observed that the TMR of the MTJs with FePt alloy electrodes was increased with S, suggesting the spin polarization of L1 0-FePt alloys was enhanced by chemical ordering.

Original languageEnglish
Pages (from-to)6789-6791
Number of pages3
JournalJournal of Applied Physics
Volume95
Issue number11 II
DOIs
Publication statusPublished - 2004 Jun 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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