Andreev reflection: A new means to determine the spin polarization of ferromagnetic materials

被引：78

作者：

Soulen, RJ ^{[1
]}

Osofsky, MS

Nadgorny, B

Ambrose, T

Broussard, P

Cheng, SF

Byers, J

Tanaka, CT

Nowack, J

Moodera, JS

Laprade, G

Barry, A

Coey, MD

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

[2] George Washington Univ, Washington, DC 20052 USA

[3] MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA

[4] INSA, Toulouse, France

[5] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 85卷 / 08期

关键词：

D O I：

10.1063/1.370417

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed a simple method to measure the transport spin polarization of ferromagnetic materials. This technique relies on the fact that the Andreev reflection process at the interface between a superconductive and normal is influenced by the spin polarization P of the normal metal. In a very short time we have been able to measure the spin polarization of several metals: NixFe1-x, Ni, Co, Fe, NiMnSb, La0.7Sr0.3MnO3, and CrO2, whose spin polarization ranges from 35% to 90%. Our results compare well with other methods for measuring P. (C) 1999 American Institute of Physics. [S0021-8979(99)25208-5].

引用

页码：4589 / 4591

页数：3

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