Switching probability in all-perpendicular spin valves
D. Bedau, H. Liu, et al.
DRC 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. Bedau, H. Liu, et al.
DRC 2010
Jonathan Z. Sun, Christopher Safranski, et al.
Physical Review B
Justin M. Shaw, Hans T. Nembach, et al.
IEEE Magnetics Letters
Jonathan Z. Sun, Christopher Safranski, et al.
Physical Review B