Spin polarization of tunneling current from ferromagnet/Al2O3 interfaces using copper-doped aluminum superconducting films
- 31 July 2000
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 77 (5), 720-722
- https://doi.org/10.1063/1.127097
Abstract
Superconducting Cu-doped Al films sputtered at room temperature (RT) show improved characteristics for superconductor–insulator–ferromagnet spin-polarization measurements as compared to dirty Al films evaporated at 77 K. Detailed analysis including temperature, depairing and spin-orbit effects reveal spin-polarization values for a large variety of ferromagnetic transition-metal alloys. The high-spin polarization for these RT-sputtered junctions is consistent with large tunnel magnetoresistance values observed in similarly sputtered magnetic tunnel junctions.Keywords
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