Effect of 3d, 4d, and 5d transition metal doping on damping in permalloy thin films

摘要

The effect of doping on the magnetic damping parameter of Ni_(80)Fe_(20) is measured for 21 transition metal dopants: Ti, V, Cr, Mn, Co, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Pt, and Au. For most of the dopants, the damping parameter increases linearly with dopant concentration. The strongest effects are observed for the 5d transition metal dopants, with a maximum of 7.7 x 10~(-3) per atomic percent osmium.