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Title: Spin-orbit enhanced demagnetization rate in Co/Pt-multilayers

In order to explore the role of enhanced spin-orbit interactions on the laser-induced ultrafast magnetization dynamics, we performed a comparative study on cobalt thin films and Co/Pt multilayers. We show that the presence of the Co/Pt interfaces gives rise to a three-fold faster demagnetization upon femtosecond laser heating. Experimental data for a wide range of laser fluences are analyzed using the Microscopic 3-Temperature Model. We find that the Elliott-Yafet spin-flip scattering in the multilayer structure is increased by at least a factor of four with respect to the elementary Co film.
Authors:
; ;  [1] ; ; ; ;  [2]
  1. Department of Applied Physics, Center for NanoMaterials, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven (Netherlands)
  2. Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Strasse 46, 67663 Kaiserslautern (Germany)
Publication Date:
OSTI Identifier:
22392018
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COBALT; DEMAGNETIZATION; LASER-RADIATION HEATING; LAYERS; L-S COUPLING; MAGNETIZATION; PLATINUM; SPIN FLIP; THIN FILMS