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- W2094760451 abstract "The point contact Andreev reflection employing niobium tips was used to determine the degree of transport current spin polarization ( Pt ) at the free surface of bulk NiMnSb at 4.2 K . The data was analyzed within the framework of a modified version of the Blonder, Tinkham, and Klapwijk formulism taking into account the two spin polarized channels in the ferromagnet and treating the interface as a planar delta function barrier of height Z between free electron materials. We find that the measured spin polarization is rather insensitive to different surface preparations and magnetic domain structure, and the maximal value of the Pt at Z=0 is 44% , consistent with recent calculations of the surface reconstruction of NiMnSb . Saturation magnetization of the samples was found to be 3.6 iB per formula unit indicative of a small amount of atomic disorder." @default.
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- W2094760451 date "2004-06-24" @default.
- W2094760451 modified "2023-10-10" @default.
- W2094760451 title "Spin polarization of the transport current at the free surface of bulk<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mtext>NiMnSb</mml:mtext></mml:mrow></mml:math>" @default.
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- W2094760451 doi "https://doi.org/10.1103/physrevb.69.214425" @default.
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