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

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Abstract

© 2015 AIP Publishing LLC. 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.
Original languageEnglish
Pages (from-to)101602-1 - 101602-5
JournalApplied Physics Letters
Volume107
Issue number10
DOIs
Publication statusPublished - 11 Sep 2015

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