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Title: Excitation of plasmons in Ag/Fe/W structure by spin-polarized electrons

Using Spin-polarized Electron-Energy Loss Spectroscopy (SPEELS), the plasmon excitations were probed in a few atomic layers thick Ag film deposited on an Fe layer or on a single crystal of W(110). The measurements were performed at two specular geometries with either a 25° or 72° angle of incidence. On a clean Fe layer (10 atomic layers thick), Stoner excitation asymmetry was observed, as expected. Deposition of a silver film on top of the Fe layer dramatically changed the asymmetry of the SPEELS spectra. The spin-effect depends on the kinematics of the scattering: angles of incidence and detection. The spin-dependence of the plasmon excitations in the silver film on the W(110) surface and on the ferromagnetic Fe film is suggested to arise from the spin-active Ag/W or Ag/Fe interfaces.
Authors:
; ;  [1] ; ;  [2] ;  [3]
  1. School of Physics, The University of Western Australia, Perth WA 6009 (Australia)
  2. St. Petersburg State University, Faculty of Physics, St. Petersburg 199034 (Russian Federation)
  3. Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth WA 6009 (Australia)
Publication Date:
OSTI Identifier:
22482027
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMMETRY; DEPOSITION; DEPOSITS; DETECTION; ELECTRONS; ENERGY-LOSS SPECTROSCOPY; EXCITATION; FILMS; GEOMETRY; INCIDENCE ANGLE; INTERFACES; LAYERS; MONOCRYSTALS; PLASMONS; SCATTERING; SILVER; SPECTRA; SPIN; SPIN ORIENTATION; SURFACES