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- W2135875891 abstract "We studied the temperature dependence of the specific contact resistance (AR <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> ) of the copper/GaMnAs interface in the range from 15 K to 290 K. This range includes the Curie temperature of the GaMnAs film of about 145 K. AR <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> is typically as low as 1×10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>- 7</sup> Ωcm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> , and decreases slowly with decreasing temperature T. However, as T approaches Curie temperature (T <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> ), AR <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> jumps to about double its value. We suggest that this behavior arises from the suppression of one of the two spin conduction channels, resulting in substantial spin polarization. This might offer a convenient scheme to estimate the spin polarization at a single ferromagnetic/nonferromagnetic (F/N) interface using all-electrical measurements." @default.
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- W2135875891 date "2011-10-01" @default.
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- W2135875891 title "Interfacial Spin Filtering and Temperature Variation of Copper/GaMnAs Contact Resistance" @default.
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- W2135875891 doi "https://doi.org/10.1109/tmag.2011.2153190" @default.
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