D.C. Worledge, G. Hu, et al.
IEDM 2010
Barrier interface condition is critical for spin-polarized tunneling and spin-transfer torque switching in CoFeB∣MgO∣CoFeB-based magnetic tunnel junctions. The differential tunnel conductance gV contains information on CoFeB’s magnetic properties at tunnel interfaces. Experimentally, we find gV to follow a “cross-normalization” relationship between the parallel and antiparallel alignments. This we show originates from the leading order spin-flip scatter terms related to CoFeB interface magnetic properties such as its exchange-stiffness. By connecting the observable gV slopes to electrode-specific spin-flip scatter rates, we obtain an efficient measurement for mass-screening of junctions for interface magnetic differences. This provides valuable information for device and fabrication process optimization.
D.C. Worledge, G. Hu, et al.
IEDM 2010
Gabriel D. Chaves-O'Flynn, Georg Wolf, et al.
Physical Review Applied
Guohan Hu, J.H. Lee, et al.
IEDM 2015
Tai Min, Qiang Chen, et al.
IEEE Transactions on Magnetics