Spin filtering through ferromagnetic BiMnO3 tunnel barriers -: art. no. 020406

被引：188
作者：
Gajek, M
Bibes, M
Barthélémy, A
Bouzehouane, K
Fusil, S
Varela, M
Fontcuberta, J
Fert, A
机构：
[1] CNRS Thales, Unite Mixte Phys, F-91767 Orsay, France
[2] CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain
[3] Univ Paris 11, Inst Elect Fondamentale, F-91404 Orsay, France
[4] Univ Evry, F-91025 Evry, France
[5] Univ Barcelona, Dept Fis Aplicada & Opt, E-08028 Barcelona, Spain
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.72.020406
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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