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- W2057012191 abstract "Magnetic tunnel junctions with a magnetically soft Heusler-alloy electrode $({mathrm{Co}}_{2}mathrm{Mn}mathrm{Si}∕mathrm{Al}+text{oxidation}+mathit{text{in}}phantom{rule{0.3em}{0ex}}mathit{text{situ}}phantom{rule{0.5em}{0ex}}text{annealing}∕{mathrm{Co}}_{7}{mathrm{Fe}}_{3}∕{mathrm{Mn}}_{83}{mathrm{Ir}}_{17})$ and a maximal tunnel magnetoresistance effect of 86% at $10phantom{rule{0.3em}{0ex}}mathrm{K}∕10phantom{rule{0.3em}{0ex}}mathrm{mV}$ are investigated with respect to their structural and magnetic properties at the lower barrier interface by electron and x-ray absorption spectroscopy. A plasma-oxidation-induced $mathrm{Mn}∕mathrm{Si}$ segregation and oxide formation at the barrier interface is found, which results in a strongly increased area-resistance product of the junctions, because of an enlarged barrier thickness. For ${mathrm{Co}}_{2}mathrm{Mn}mathrm{Si}$ thickness equal to $8phantom{rule{0.3em}{0ex}}mathrm{nm}$ or larger, ferromagnetic order of Mn and Co spins at the interface is induced by annealing; simultaneously, atomic ordering at the interface is observed. The influence of the structural and magnetic interface properties on the temperature-dependent transport properties of the junctions is discussed." @default.
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- W2057012191 date "2004-07-30" @default.
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- W2057012191 title "Interface structure and magnetism of magnetic tunnel junctions with a<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi mathvariant=normal>Co</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>Mn</mml:mi><mml:mi mathvariant=normal>Si</mml:mi></mml:mrow></mml:math>electrode" @default.
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- W2057012191 doi "https://doi.org/10.1103/physrevb.70.024426" @default.
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