Superconducting Spin Switch with Infinite Magnetoresistance Induced by an Internal Exchange Field
| Autor: | Marguerite Epstein-Martin, Don Heiman, Markus Münzenberg, Jagadeesh S. Moodera, Bin Li, Badih A. Assaf, Marius Eich, Niklas Roschewsky |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Superconductivity Magnetoresistance Condensed matter physics General Physics and Astronomy Insulator (electricity) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetization S interface Ferromagnetism 0103 physical sciences 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Letters. 110 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | A theoretical prediction by de Gennes suggests that the resistance in a FI/S/FI (where FI is a ferromagnetic insulator, and S is a superconductor) structure will depend on the magnetization direction of the two FI layers. We report a magnetotransport measurement in a EuS/Al/EuS structure, showing that an infinite magnetoresistance can be produced by tuning the internal exchange field at the FI/S interface. This proximity effect at the interface can be suppressed by an Al(2)O(3) barrier as thin as 0.3 nm, showing the extreme confinement of the interaction to the interface giving rise to the demonstrated phenomena. |
| Databáze: | OpenAIRE |
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