We utilize nanoscale spin valves with Pt spacer layers to characterize spin scattering in Pt. Analysis of the spin lifetime determined from our measurements indicates that the extrinsic Elliot-Yafet spin scattering is dominant at room temperature, while the intrinsic Dyakonov-Perel mechanism dominates at cryogenic temperatures. The significance of the latter is supported by the suppression of spin relaxation in Pt layers interfaced with a ferromagnet, likely caused by the competition between the effective exchange and spin-orbit fields.
@article{arxiv.1707.05330,
title = {Intrinsic and extrinsic contributions to spin scattering in Pt},
author = {Ryan Freeman and Andrei Zholud and Zhiling Dun and Haidong Zhou and Sergei Urazhdin},
journal= {arXiv preprint arXiv:1707.05330},
year = {2018}
}