Spin-polarized tunneling in MgO-based tunnel junctions with superconducting electrodes
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Schebaum-2012-Spin-polarized tunne.pdf
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Author(s)
Schebaum, Oliver
Fabretti, Savio
Moodera, Jagadeesh
Thomas, Andy
Date Issued
March 2012
Journal
New Journal of Physics
Publisher
IOP Publishing
Citation
Schebaum, Oliver et al. “Spin-polarized Tunneling in MgO-based Tunnel Junctions with Superconducting Electrodes.” New Journal of Physics 14.3 (2012): 033023. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft 2012
Version
Final published version
Abstract
We prepared magnetic tunnel junctions with one ferromagnetic and one superconducting Al–Si electrode. Pure cobalt electrodes were compared with a Co–Fe–B alloy and the Heusler compound Co[subscript 2]FeAl. The polarization of the tunneling electrons was determined using the Maki–Fulde model and is discussed along with the spin–orbit scattering and the total pair-breaking parameters. The junctions were post-annealed at different temperatures to investigate the symmetry filtering mechanism responsible for the giant tunneling magnetoresistance ratios in Co–Fe–B/MgO/Co–Fe–B junctions.
MIT Department
Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1088/1367-2630/14/3/033023
