11. D. Wu, G. Yu, Q. Shao, X. Li, H. Wu, K. L. Wong, Z. Zhang, X. F. Han, P. K. Amiri, and K. L. Wang, In-plane current-driven spin-orbit torque switching in perpendicularly magnetized films with enhanced thermal tolerance, Appl. Phys. Lett. 108, 212406 (2016)