Measurement of spin polarization by Andreev reflection in ferromagnetic In1-xMnxSb epilayers

被引：20

作者：

Panguluri, RP ^{[1
]}

Nadgorny, B

Wojtowicz, T

Lim, WL

Liu, X

Furdyna, JK

机构：

[1] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[2] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[3] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 24期

关键词：

D O I：

10.1063/1.1760883

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We carried out point contact Andreev reflection (PCAR) spin spectroscopy measurements on epitaxially grown ferromagnetic In1-xMnxSb epilayers with a Curie temperature of similar to9 K. The spin sensitivity of PCAR in this material was demonstrated by parallel control studies on its nonmagnetic analog, In1-yBeySb. We found the conductance curves of the Sn point contacts with In1-yBeySb to be fairly conventional, with the possible presence of proximity-induced superconductivity effects at the lowest temperatures. These measurements provided control data for subsequent PCAR measurements on ferromagnetic In1-xMnxSb, which indicated spin polarization in In1-xMnxSb to be 52+/-3%. (C) 2004 American Institute of Physics.

引用

页码：4947 / 4949

页数：3

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