A new spin filter: The magnetic Schottky diode

被引：3

作者：

Filipe, A ^{[1
]}

Drouhin, HJ ^{[1
]}

Lampel, G ^{[1
]}

Lassailly, Y ^{[1
]}

Peretti, J ^{[1
]}

Safarov, VI ^{[1
]}

Schuhl, A ^{[1
]}

机构：

[1] Thomson CSF, Cent Rech Lab, F-91404 Orsay, France

来源：

MAGNETIC ULTRATHIN FILMS, MULTILAYERS AND SURFACES - 1997 | 1997年 / 475卷

关键词：

D O I：

10.1557/PROC-475-75

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observe spin-dependent transmission of hot electrons through the ferromagnetic metallic layer of a Schottky diode. A 25% spin-polarized electron beam is produced in vacuum by a GaAs photocathode under illumination with circularly polarized light. The photoemitted electrons are then injected from the vacuum into the sample: a 3.5 nm-thick Fe layer deposited on a n-doped GaAs substrate. We measure a transmission coefficient of the order of a few 10(-4). Using an incident energy above the Fermi level equal to 5 eV, a 5% asymmetry in the transmitted current is observed by changing the spin-polarization of the incident electrons (i.e. the light polarization) and/or reversing the Fe-layer magnetization. This corresponds to a transmission spin-dependence of 20% for a 100% spin-polarized incident beam.

引用

页码：75 / 80

页数：6