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The bias dependence of tunneling magnetoresistance oscillations due to dynamic resonant tunneling in CoFeB∕MgO∕NiFe magnetic tunnel junctions was studied as functions of temperature and the relative magnetization angle of the two magnetic layers. The effect of temperature is consistent with thermal smearing, while that of the relative magnetic orientation was typical of a spin valve. A model of tunneling between spin-split free electron bands using the exact solution of the Schrödinger equation for a trapezoidal tunnel barrier agrees with experiment, underscoring the simplicity of dynamic resonant tunneling.
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Miller et al. (2008) studied this question.
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