2005/11/01 by Sandipan Pramanik, Pramanik, Sandipan, Carmen Gabriela Stefanita +3
Engineering · Physics and Astronomy · #Advanced Memory and Neural Computing #FOS: Physical sciences #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Semiconductor materials and devices #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0511029
Will be presented at the Electronic and Photonic Materials and Devices Conference. Kolkata, INDIA
arxiv created 2005/11/01 · openalex publication_date 2005/11/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report experimental study of spin transport in all-metal nanowire spin valve structures. The nanowires have a diameter of 50 nm and consist of three layers - cobalt, copper and nickel. Based on the experimental observations, we conclude that the primary spin relxation mechanism in the paramagnet copper is the Elliott-Yafet mode associated with frequent interface roughness scattering. This mode is overwhelmingly dominant over all other modes, so that we are able to study the pure Elliott-Yafet mode in isolation. We deduce that the effective spin relaxation length associated with this mechanism is about 16 nm in our nanowires and is fairly independent of temperature in the range 1 - 100 K. The corresponding spin relaxation time is about 100 femtoseconds. We also find that the spin relaxation length or time is fairly independent of the electric field driving the current in the range 0.75 - 7.5 kV/cm.