Abstract
We present tunnel magnetoresistance values of up to 147% at room temperature and 273% at 13 K for MgO-based magnetic tunnel junctions with Co 2 FeAl and Co–Fe electrodes. The magnetic moment and coercive field were examined as a function of the annealing temperature by alternating gradient magnetometer investigations. This is compared with X-ray diffraction studies of the same samples and all results are contrasted to similar layer stacks based on the Heusler compound Co 2 MnSi .
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