Spin relaxation mechanism in Silver nanowires covered with MgO protection layer

Details Spin relaxation mechanism in Silver nanowires covered with MgO protection layer Spin relaxation mechanism in Silver nanowires covered with MgO protection layer

2011-04-19

arxiv.org/abs/1104.3718v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages, 3figures

Scientific paper

Spin-flip mechanism in Ag nanowires with MgO surface protection layers has been investigated by means of nonlocal spin valve measurements using Permalloy/Ag lateral spin valves. The spin flip events mediated by surface scattering are effectively suppressed by the MgO capping layer. The spin relaxation process was found to be well described in the framework of Elliott-Yafet mechanism and then the probabilities of spin-filp scattering for phonon or impurity mediated momentum scattering is precisely determined in the nanowires. The temperature dependent spin-lattice relaxation follows the Bloch-Gr\"uneisen theory and falls on to a universal curve for the monovalent metals as in the Monod and Beuneu scaling determined from the conduction electron spin resonance data for bulk.

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