点接触Andreev反射法测定RFe2（R = Dy，Er，Y）的自旋极化
Determination of the Spin Polarization of RFe2 (R = Dy, Er, Y) by Point Contact Andreev Reflection
摘要：
用点接触Andreev反射法研究了外延生长的金属间化合物RFe_2（R = Dy，Er，Y）薄膜。自旋极化值通过拟合机械Nb/RFe 2点接触的归一化电导曲线来提取，使用修改的Blonder-Tinkham-Klapwijk（BTK）模型。该模型与实验数据吻合较好。自旋极化的提取值，这是接近铁的自旋极化，揭示没有变化与所测量的金属间化合物的稀土成分。这表明，使用这种技术，我们探测Fe亚晶格，这种晶格驱动这些化合物中的自旋电子效应。
英文摘要：
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 (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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