Fabrication and characterization of L10-ordered FePt/AlO/FeCo magnetic tunnel junctions

S. Mitani, K. Tsukamoto, T. Seki, T. Shima, K. Takanashi

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21 Citations (Scopus)


Magnetic tunnel junctions (MTJs) with an L10 -ordered FePt alloy were fabricated and characterized. As a bottom electrode, an in-plane magnetized L10 FePt(110) layer was grown epitaxially on an Au buffer layer. A multiple oxidation process was used for the formation of Al oxide barriers. The L10-FePt/AlO/FeCo MTJ prepared shows tunnel magnetoresistance of 18% and 40% at room temperature (RT) and 4.2 K, respectively. The observed RT magnetoresistance is improved, compared to the previously reported results for the L10-FePt MTJs by a conventional single oxidation process.

Original languageEnglish
Pages (from-to)2606-2608
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2005 Oct


  • FePt-ordered alloy
  • Multiple oxidation
  • Tunnel junction
  • Tunnel magnetoresistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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