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

被引：5
作者：
Schebaum, Oliver [1 ]
Fabretti, Savio [1 ]
Moodera, Jagadeesh S. [2 ]
Thomas, Andy [1 ]
机构：
[1] Univ Bielefeld, D-33615 Bielefeld, Germany
[2] MIT, Francis Bitter Magnet Lab, Cambridge, MA 02139 USA
来源：
NEW JOURNAL OF PHYSICS | 2012年 / 14卷
关键词：
ROOM-TEMPERATURE; BAND-STRUCTURE; MAGNETORESISTANCE;
D O I：
10.1088/1367-2630/14/3/033023
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：10
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