“Current-driven magnetization reversal and spin-wave excitations in Co/Cu/Co pillars,” J. A. Katine, F. J. Albert, R. A Buhrman, E. B. Myers, and D. C. Ralph, Phys. Rev. Lett. 84, 3149-3152 (2000): https://doi.org/10.1103/PhysRevLett.84.3149

“Dependence of the efficiency of spin Hall torque on the transparency of Pt/ferromagnetic layer interfaces.” C.-F. Pai, Y. Ou, L. H. Vilela-Leao, D. C. Ralph, and R. A. Buhrman, Physical Review B 92, 064426 (2015). https://doi.org/10.1103/PhysRevB.92.064426

“Spin Torque Study of the Spin Hall Conductivity and Spin Diffusion Length in Platinum Thin Films with Varying Resistivity,” M. H. Nguyen, D. C. Ralph, and R. A. Buhrman, Physical Review Letters 116 (2016), Artn 126601, https://doi.org/10.1103/PhysRevLett.116.126601.