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Epitaxially grown intermetallic RFe2 (R = Dy, Er, Y) thin films have beenstudied by point contact Andreev reflection. Spin polarization values wereextracted by fitting normalized conductance curves for mechanical Nb/RFe2 pointcontacts, using a modified Blonder-Tinkham-Klapwijk (BTK) model. Good agreementis found between this model and the experimentally obtained data. Extractedvalues of spin polarization, which are close to the spin polarization of Fe,reveal no variation with the rare earth component for the measuredintermetallic compounds. This suggests that using this technique we probe theFe sub-lattice, and that this lattice drives spintronic effects in thesecompounds.

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