Low-temperature electronic transport properties in thin films of Pd and PdH0.3.

Abstract

Low-temperature magnetoresistance measurements have been used to determine various electron scattering times in pure Pd and ${\mathrm{PdH}}_{0.3}$ thin films with different thicknesses, which have been prepared by electron-gun evaporation. From low-field magnetoresistance measurements, using localization theory, the spin-flip, electron-electron, and electron-phonon relaxation times can be deduced and they are found to depend on the electronic structure of both systems. It is also found that the increase of the disorder of the systems enhances the spin-orbit coupling, which is larger in ${\mathrm{PdH}}_{0.3}$ than in Pd. On the other hand, the high-field magnetoresistance allows the determination of both the Coulomb screening factor F and the Land\'e factor g for both systems. It is found that the F factor depends on the band structure and takes the mean values 0.63 and 0.53 for pure Pd and ${\mathrm{PdH}}_{0.3}$, respectively, while the g factor depends on the degree of disorder.