Influence of annealing on spin pumping in sputtered deposited Co/Pt bilayer thin films

• DOI: 10.1016/j.physb.2019.06.048
• Publication Date: 2019-06-21T21:30:13Z
• Authors: Akash Kumar; Nidhi Pandey; Dileep Kumar; Mukul Gupta; Sujeet Chaudhary; Pranaba Kishor Mu...
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract We report on the ferromagnetic resonance study of the Co/Pt thin films as a function of the post growth annealing. We found a significant increase in the spin mixing conductance, Gilbert damping parameter and inhomogeneous linewidth broadening with increase in annealing temperature. This behavior is correlated to the structural degradation of Co layer and in particular formation of CoxPt1−x alloy at the interface, which gives rise to increase in dissipation of spin current at the interface. The results are important for understanding of spin-orbit torque in Co/Pt bilayer structures.