Abstract
We investigated perpendicular CoFeB-MgO magnetic tunnel junctions (MTJs) with a recording structure consisting of two CoFeB-MgO interfaces, MgO/CoFeB (1.6 nm)/Ta (0.4 nm)/CoFeB (1.0 nm)/MgO. Thermal stability factor of MTJ with the structure having junction size of 70 nm was increased by a factor of 1.9 from the highest value of perpendicular MTJs with single CoFeB-MgO interface having the same device structure. On the other hand, intrinsic critical current for spin transfer torque switching of the double- and single-interface MTJs was comparable.
Original language | English |
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Article number | 022414 |
Journal | Applied Physics Letters |
Volume | 101 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2012 Jul 9 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)