Andreev reflection: A new means to determine the spin polarization of ferromagnetic materials
Andreev reflection: A new means to determine the spin polarization of ferromagnetic materials
复制标题
安德烈夫反射：确定铁磁材料自旋极化的新方法
DOI：
10.1063/1.370417
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发表时间：
1999
影响因子：
3.2
通讯作者：
M. Coey
中科院分区：
文献类型：
--
作者：
R. Soulen;M. Osofsky;B. Nadgorny;T. Ambrose;P. Broussard;S. Cheng;J. Byers;C. Tanaka;J. Nowack;J. Moodera;G. Laprade;A. Barry;M. Coey
我们开发了一种测量铁磁材料输运自旋极化的简单方法。这种技术依赖于一个事实，即超导和正常金属之间的界面上的Andreev反射过程受到正常金属的自旋极化P的影响。在很短的时间内，我们已经能够测量几种金属的自旋极化：NixFe1−x， Ni, Co, Fe, NiMnSb, La0.7Sr0.3MnO3和CrO2，其自旋极化范围在35%到90%之间。我们的结果与其他测量P的方法比较好。
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.