Probing ferromagnets with Andreev reflection

被引：392

作者：

Upadhyay, SK ^{[1
]}

Palanisami, A ^{[1
]}

Louie, RN ^{[1
]}

Buhrman, RA ^{[1
]}

机构：

[1] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.81.3247

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High transmissivity, ferromagnet-superconductor thin film nanocontacts are studied experimentally. Compared to nonmagnetic metal-superconductor contacts, Andreev reflection is strongly suppressed due to the spin polarization of conduction electrons in the ferromagnet. This effect is used to measure both the transparency of the interface and spin polarization of the direct current in the ferromagnet in contrast to the spin polarization of the tunneling current previously measured in ferromagnet-insulator-superconductor systems. [S0031-9007(98)07318-9].

引用

页码：3247 / 3250

页数：4

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