A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2007; you can also visit the original URL.
The file type is
We report on the experimental evidence of the tunneling magnetoresistance ͑TMR͒ effect near 3% and its inversion in strongly antiferromagnetically coupled Fe͑001͒/͓͑Si͑0.2 nm͒/ Ge͑0.2 nm͔͒ * 5͒ / Fe epitaxial structures with diffused interfaces. We explain the inversion of TMR with biasing voltage by resonant tunneling across impurity states with weak spin split ⌬E ϳ 10 meV and spin-dependent filtering in the spacer layer. The resonant tunneling is manifested in spin-dependent resonances closedoi:10.1063/1.2198812 fatcat:sexfc5cxvjgs7jis3kmh5pf3jq