Gajek, M.Bibes, ManuelBarthélémy, AgnèsBouzehouane, K.Fusil, S.Varela Fernández, Manuel, 1956-Fontcuberta i Griñó, JosepFert, Albert, 1938-2009-12-292009-12-2920050163-1829https://hdl.handle.net/2445/10645We 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.4 p.application/pdfeng(c) The American Physical Society, 2005MaterialsPropietats magnètiquesFísica de l'estat sòlidMagnetic properties and materialsElectron and ion emission by liquids and solidsinfo:eu-repo/semantics/article523573info:eu-repo/semantics/openAccess