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....

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Bibliographic Details
Published in:Applied physics letters 2015-09, Vol.107 (10)
Main Authors: Samarin, Sergey N., Artamonov, Oleg M., Baraban, Alexander P., Kostylev, Mikhail, Guagliardo, Paul, Williams, J. F.
Format: Article
Language:English
Subjects:
Angles (geometry)
Applied physics
ASYMMETRY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Dependence
DEPOSITION
DEPOSITS
DETECTION
Electron energy loss spectroscopy
Electron spin
ELECTRONS
Energy dissipation
ENERGY-LOSS SPECTROSCOPY
EXCITATION
Ferromagnetic materials
GEOMETRY
INCIDENCE ANGLE
INTERFACES
Kinematics
LAYERS
MONOCRYSTALS
PLASMONS
SCATTERING
SILVER
Single crystals
SPECTRA
Spectrum analysis
SPIN
SPIN ORIENTATION
SURFACES
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4930841