Exchange-field penetration into a tunnel barrier: Spin selection in electron tunneling from a paramagnet to a ferromagnet
- 1 February 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 45 (6) , 3117-3118
- https://doi.org/10.1103/physrevb.45.3117
Abstract
It is shown that the tunnel barrier for electron tunneling from a paramagnet to a ferromagnet preferentially enhances the majority-spin tunneling probability, thus resulting in spin selection. This is due to the ferromagnet-exchange-field penetration into the tunnel barrier. In the context of this effect, we discuss experiments reported by Tedrow and Meservey [Phys. Rev. B 7, 318 (1973)].Keywords
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