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We present an ab-initio calculation of the electronic structure near the interfaces of the Fe O -MgO-Fe O magnetic tunnel junction, and we give a clear description of the interface states which can exist in this device. We describe in particular the decay rate of these localized states on both sides of the interface. These interface states participate to the tunnel current across the MgO barrier and...
We have grown single crystals of novel ruthenates (Sr,Ba)(Fe,Co)2+xRu4-xO11 that exhibit long-range ferromagnetic order well above room temperature, accompanied by narrow-gap semiconducting properties that include a large anomalous Hall conductance, low resistivity, high carrier concentration and low coercive field, which are properties well suited to spintronic applications. X-ray diffraction, EDX,...
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