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Título: | Toward the absolute spin-valve effect in superconducting tunnel junctions |
Autor: | Simoni, Giorgio de; Strambini, Elia; Moodera, J. S.; Bergeret, F. S. CSIC ORCID; Giazotto, Francesco | Palabras clave: | Ferromagnetic insulator Magnetic memories Spin valve Spintronics Superconductivity Tunneling magneto-resistance |
Fecha de publicación: | 2018 | Editor: | American Chemical Society | Citación: | Nano Letters 18(10): 6369-6374 (2018) | Resumen: | A superconductor with a spin-split excitation spectrum behaves as an ideal ferromagnetic spin-injector in a tunneling junction. It was theoretically predicted that the combination of two such spin-split superconductors with independently tunable magnetizations may be used as an ideal absolute spin-valve. Here, we report on the first switchable superconducting spin-valve based on two EuS/Al bilayers coupled through an aluminum oxide tunnel barrier. The spin-valve shows a relative resistance change between the parallel and antiparallel configuration of the EuS layers up to 900% that demonstrates a highly spin-polarized current through the junction. Our device may be pivotal for realization of thermoelectric radiation detectors, a logical element for a memory cell in cryogenics, superconductor-based computers, and superconducting spintronics in general. | Versión del editor: | https://doi.org/10.1021/acs.nanolett.8b02723 | URI: | http://hdl.handle.net/10261/178470 | DOI: | 10.1021/acs.nanolett.8b02723 | ISSN: | 1530-6984 | E-ISSN: | 1530-6992 |
Aparece en las colecciones: | (CFM) Artículos |
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superspinvalve.pdf | 3,23 MB | Adobe PDF | Visualizar/Abrir |
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