We report the study of the real-time evolution of tunneling magnetoresistance (TMR) in CoFeBMgOCoFeB junctions during annealing at 380 °C. The TMR quickly developed at the early stage of the annealing, with 200% magnetoresistance observed in less than 10 min, followed by a slow approach to saturation. This evolution of TMR was correlated with the structural changes, including crystallization of amorphous CoFeB electrodes and improvement of barrier quality during the annealing.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)