2019/01/20 by Muhammad Faiz, Faiz, M., Raghava P. Panguluri +15
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Quantum and electron transport phenomena #Strongly Correlated Electrons (cond-mat.str-el) #Surface and Thin Film Phenomena #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1901.06756
openalex publication_date 2019/01/20 · arxiv created 2019/01/21 · arxiv updated 2019/01/23 · openalex created_date 2022/07/30 · openalex updated_date 2026/07/28
The behavior of spin propagation in metals in various measurement schemes is shown to be qualitatively different than a simple exponential decay - due to the backflow effect on spin diffusion in the presence of interfaces. To probe this effect we utilize the spin sensitivity of an Andreev contact between gold films of variable thickness deposited on top of a spin injector, Co2Mn0.5Fe0.5Si, with the spin polarization of approximately 45%, and Nb superconducting tip. While the results are consistent with gradually decaying spin polarization as the film thickness increases, the spin diffusion length in Au found to be 285 nm, is more than two times larger that one would have obtained without taking the backflow effect into account.