Determination of the spin polarization of RFe2 (R = Dy, Er, Y) by point contact Andreev reflection

被引：2
|
作者：
Morrison, C. [1 ]
Wang, D. [1 ,2 ]
Bowden, G. J. [1 ]
Ward, R. C. C. [3 ]
de Groot, P. A. J. [1 ]
机构：
[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[2] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China
[3] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England
来源：
JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
LAVES PHASE SUPERLATTICES; 2-PHASE MAGNETS; ENERGY PRODUCT; SPRING MAGNET; MEDIA; TRANSITION; JUNCTIONS; METAL;
D O I：
10.1063/1.3698597
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Epitaxially grown intermetallic RFe2 (R = Dy, Er, Y) thin films have been studied by point contact Andreev reflection. Spin polarization values were extracted by fitting normalized conductance curves for mechanical Nb/RFe2 point contacts, using a modified Blonder-Tinkham-Klapwijk model. Good agreement is found between this model and the experimentally obtained data. Extracted values of spin polarization, which are close to the spin polarization of Fe, reveal no variation with the rare earth component for the measured intermetallic compounds. This suggests that using this technique we probe the Fe sub-lattice, and that this lattice drives spintronic effects in these compounds. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3698597]
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页数：4
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