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

Journal Article · Mon Sep 07 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4930841· OSTI ID:22482027

Samarin, Sergey N.; Kostylev, Mikhail; Williams, J. F. ^[1]; Artamonov, Oleg M.; Baraban, Alexander P. ^[2]; Guagliardo, Paul ^[3]

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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)

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.

• OSTI ID: 22482027
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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