Anomalous magnetoresistance in 2D Pd and PdHx films

H. Raffy , P. Nédellec , L. Dumoulin , D.S. Maclachlan , J.P. Burger

We report on the anomalous magnetoresistance (AMR) of thin Pd and PdH x films, two metal systems which have very different electronic structures. For pure Pd, the AMR can be attributed to a weak localization regime in the presence of a strong spin-orbit scattering rate while in PdHx it is the Maki-Thompson contribution which tends to prevail. We deduce also from these measurements the spin-flip, electron-electron and electron-phonon diffusion lengths and find them to be strongly dependent on the electronic structure : the spin-flip diffusion length is larger in Pd than in PdHx, while it is just the opposite for the two inelastic diffusion lengths. Reasonable agreement is found with theories in the case of PdHx as concerns the universal behaviour of the Maki-Thompson parameter and the absolute values of the inelastic scattering rates. For the case of Pd, refinements of the theory are needed and some suggestions are made.

Mots clés: magnetoresistance; metallic thin films; palladium; palladium alloys

Domaines: Articles anciens

H. Raffy, P. Nédellec, L. Dumoulin, D.S. Maclachlan, J.P. Burger. Anomalous magnetoresistance in 2D Pd and PdHx films. Journal de Physique, 1985, 46 (4), pp.627-635. ⟨10.1051/jphys:01985004604062700⟩. ⟨jpa-00210003⟩