Spin polarized tunneling in MgO-based tunnel junctions with superconducting electrodes

Oliver Schebaum; Jagadeesh S. Moodera; Andy Thomas

doi:10.1088/1367-2630/14/3/033023

Spin polarized tunneling in MgO-based tunnel junctions with superconducting electrodes

Materials Science 2015-06-03 v1 Other Condensed Matter

Authors: Oliver Schebaum , Jagadeesh S. Moodera , Andy Thomas

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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 Co2FeAl. 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.

Keywords

magnetic tunnel junctions spin polarized tunneling MgO barrier superconducting electrodes Maki-Fulde model symmetry filtering tunneling magnetoresistance

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@article{arxiv.1112.2110,
  title  = {Spin polarized tunneling in MgO-based tunnel junctions with superconducting electrodes},
  author = {Oliver Schebaum and Jagadeesh S. Moodera and Andy Thomas},
  journal= {arXiv preprint arXiv:1112.2110},
  year   = {2015}
}

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11 pages, 5 figures

Spin polarized tunneling in MgO-based tunnel junctions with superconducting electrodes

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