Determination of the Spin Polarization of RFe2 (R = Dy, Er, Y) by Point Contact Andreev Reflection

Details Determination of the Spin Polarization of RFe2 (R = Dy, Er, Y) by Point Contact Andreev Reflection Determination of the Spin Polarization of RFe2 (R = Dy, Er, Y) by Point Contact Andreev Reflection

2008-09-22

arxiv.org/abs/0809.3723v2

Physics

Condensed Matter

Other Condensed Matter

11 pages, 1 figure. The following article has been submitted to Applied Physics Letters. After it is published, it will be fou

Scientific paper

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 (BTK) 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.

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