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arXiv · 1408.1827

Spin-valve effects in point contacts to exchange biased Co40Fe40B20 films

O. P. Balkashin·V. V. Fisun·L. Yu. Triputen·S. Andersson·V. Korenivski·Yu. G. Naidyuk
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Abstract

Nonlinear current-voltage characteristics and magnetoresistance of point contacts between a normal metal (N) and films of amorphous ferromagnet (F) Co40Fe40B20 of different thickness, exchange-biased by antiferromagnetic Mn80Ir20 are studied. A surface spin valve effect in the conductance of such F-N contacts is observed. The effect of exchange bias is found to be inversely proportional to the Co40Fe40B20 film thickness. This behavior as well as other magneto-transport effects we observe on single exchange-pinned ferromagnetic films are similar in nature to those found in conventional three-layer spin-valves.

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O. P. Balkashin, V. V. Fisun, L. Yu. Triputen, S. Andersson, V. Korenivski, Yu. G. Naidyuk. 2014-08-08. Spin-valve effects in point contacts to exchange biased Co40Fe40B20 films. https://doi.org/10.1063/1.4897413

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