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.

引用

页数：10

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