Title :
Fabrication and characterization of L10-ordered FePt/AlO/FeCo magnetic tunnel junctions
Author :
Mitani, S. ; Tsukamoto, K. ; Seki, T. ; Shima, T. ; Takanashi, K.
Author_Institution :
Inst. for Mater. Res., Tohoku Univ., Sendai, Japan
Abstract :
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.
Keywords :
buffer layers; epitaxial growth; iron alloys; magnetisation; oxidation; tunnelling magnetoresistance; Au buffer layer; FePt; FePt- ordered alloy; MTJ; epitaxial growth; magnetic tunnel junctions; multiple oxidation process; single oxidation process; tunnel magnetoresistance; Electrodes; Fabrication; Large scale integration; Magnetic anisotropy; Magnetic materials; Magnetic tunneling; Oxidation; Sputtering; Substrates; Tunneling magnetoresistance; FePt-ordered alloy; multiple oxidation; tunnel junction; tunnel magnetoresistance;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854718
