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- W2077952854 abstract "Spin polarization $(P)$ of the electron tunnel current is observed for a ferromagnetic $mathrm{EuO}$ tunnel barrier between nonferromagnetic electrodes. Spin filtering due to different barrier heights for the spin-up and spin-down electrons gives rise to $P$, which was measured using a superconducting Al electrode as the spin detector. A large internal exchange field is exerted by the ${mathrm{Eu}}^{2+}$ ions on the $mathrm{Al}$ quasiparticle density of states, evidenced by enhanced Zeeman splitting even at zero applied field. Using a ferromagnetic barrier to filter spins has potential as a means for injecting a polarized current into semiconductors. Our $mathrm{EuO}$ films show structure, magnetic moment, and Curie temperature matching bulk $mathrm{EuO}$." @default.
- W2077952854 created "2016-06-24" @default.
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- W2077952854 date "2004-06-25" @default.
- W2077952854 modified "2023-10-18" @default.
- W2077952854 title "Observation of spin filtering with a ferromagnetic<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>EuO</mml:mi></mml:mrow></mml:math>tunnel barrier" @default.
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- W2077952854 doi "https://doi.org/10.1103/physrevb.69.241203" @default.
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