Abstract
We report the temperature dependent collapse of tunnel magnetoresistance (TMR) in perpendicular anisotropy magnetic tunnel junctions (pMTJs) with AlOx barriers and (Co/Pt)3 multilayer electrodes, due to the coercivity crossover of the top and bottom (Co/Pt)3 stacks. The different temperature dependence of two (Co/Pt)3 stacks in pMTJs is mainly caused by the additional perpendicular anisotropy created at interface between the ferromagnetic electrode and the AlOx barrier.
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