Spin-polarized tunneling in MgO-based tunnel junctions with superconducting electrodes
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 Co[subscript 2]FeAl. The polarization of the tunneling electrons was determined using the Maki–Fulde model and is d...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/71963 |
| Summary: | 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 Co[subscript 2]FeAl. 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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