Spin precession modulation in a magnetic bilayer

Journal Article · Mon Dec 24 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4773508· OSTI ID:22089640

Stupakiewicz, A.; Maziewski, A. ^[1]; Pashkevich, M. ^[1]; Stognij, A.; Novitskii, N. ^[2]

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1. Laboratory of Magnetism, Faculty of Physics, University of Bialystok, Lipowa 41, Bialystok (Poland)
2. Scientific-Practical Materials Research Centre of the NASB, P. Brovki 19, Minsk (Belarus)

We report on modulation of the spin precession in a Co/garnet bilayer by femtosecond laser excitation using time-resolved magneto-optical tools. Damped oscillations in the Faraday rotation transients representing precessional motion of the magnetization vector are observed in both the 2 nm Co layer and 1.8 {mu}m garnet of the bilayer with distinct frequencies differing by about a factor of two. The excitation efficiency of these precessions strongly depends on the out-of-plane magnetic field. The modulation effect with the coupling in a magnetic bilayer can be useful for non-thermally controlling the magnetization of nanomagnets and ultrafast switching in magnetic nanodevices.

• OSTI ID: 22089640
• Journal Information: Applied Physics Letters, Vol. 101, Issue 26; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
CALCIUM COMPOUNDS
COUPLING
EFFICIENCY
EXCITATION
FARADAY EFFECT
GARNETS
LASER RADIATION
LAYERS
MAGNETIC FIELDS
MAGNETIZATION
MODULATION
OSCILLATIONS
SPECTRA
SPIN
THIN FILMS
TIME RESOLUTION
YTTRIUM COMPOUNDS