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TAMR effect in (Ga,Mn)As-based tunnel structures

Ciorga, Mariusz ; Schlapps, Markus ; Einwanger, Andreas ; Geißler, Stefan ; Sadowski, J. ; Wegscheider, Werner ; Weiss, Dieter


We discuss the results of our experiments on tunnel devices based on (Ga,Mn)As structures. Those include p + -(Ga, Mn)As/n + -GaAs Esaki diodes and laterally defined narrow nanoconstrictions in (Ga,Mn)As epilayers. We found in those structures strong anisotropic magnetoresistance behaviour with features that could be attributed to the novel tunnelling anisotropic magnetoresistance effect. We ...


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