Current-driven Magnetization Reversal in a Ferromagnetic Semiconductor (Ga,Mn)As/GaAs/(Ga,Mn)As Tunnel Junction
Abstract
Current-driven magnetization reversal in a ferromagnetic semiconductor based (Ga,Mn)As/GaAs/(Ga,Mn)As magnetic tunnel junction is demonstrated at 30 K. Magnetoresistance measurements combined with current pulse application on a rectangular 1.5x0.3 um^2 device revealed that magnetization switching occurs at critical current densities of 1.1 - 2.2x10^5 A/cm^2. Possible mechanisms responsible for the effect are discussed.Keywords
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