Abstract
We extend to a new antiferromagnetic alloy, IrMn, point-contact based studies of the effect of a large current density on the exchange bias at antiferromagnet/ferromagnet (AFM/F) interfaces. Similarly to the case of AFM=CoFe, a negative current density ∼1012A∕m2 injected through the F=CoFe into an IrMn∕CoFe interface was found to increase the exchange bias, while a positive current decreased it. The model used to describe the data for FeMn∕CoFe, based on predicted current-induced torques on AFM, can explain the new data.
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