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Title: Spin filtering through ferromagnetic BiMnO3 tunnel barriers
Author: Gajek, M.
Bibes, Manuel
Barthélémy, Agnès
Bouzehouane, K.
Fusil, S.
Varela Fernández, Manuel, 1956-
Fontcuberta i Griñó, Josep
Fert, Albert, 1938-
Keywords: Materials
Propietats magnètiques
Física de l'estat sòlid
Magnetic properties and materials
Electron and ion emission by liquids and solids
Issue Date: 2005
Publisher: The American Physical Society
Abstract: We report on experiments of spin filtering through ultrathin single-crystal layers of the insulating and ferromagnetic oxide BiMnO3 (BMO). The spin polarization of the electrons tunneling from a gold electrode through BMO is analyzed with a counterelectrode of the half-metallic oxide La2/3Sr1/3MnO3 (LSMO). At 3 K we find a 50% change of the tunnel resistances according to whether the magnetizations of BMO and LSMO are parallel or opposite. This effect corresponds to a spin-filtering efficiency of up to 22%. Our results thus show the potential of complex ferromagnetic insulating oxides for spin filtering and injection.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2005, vol. 72, núm. 2, p. 020406-1-020406-4
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Aplicada)

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