6533b82dfe1ef96bd1291fa8
RESEARCH PRODUCT
Brillouin light scattering study of Co$_{2}$Cr$_{0.6}$Fe$_{0.4}$Al and Co$_{2}$FeAl Heusler compounds
Jaroslav HamrleSimon TrudelO. GaierBurkard HillebrandsC. HerbortA. Conca ParraMartin JourdanE Arbelosubject
PhysicsCondensed Matter - Materials ScienceAcoustics and UltrasonicsScatteringmedia_common.quotation_subjectMagnonMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesCondensed Matter PhysicsAsymmetryLight scatteringSpectral lineSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsBrillouin zoneSpin waveAtomic physicsSpectroscopymedia_commondescription
The thermal magnonic spectra of Co$_{2}$Cr$_{0.6}$Fe$_{0.4}$Al (CCFA) and Co$_2$FeAl were investigated using Brillouin light scattering spectroscopy (BLS). For CCFA, the exchange constant A (exchange stiffness D) is found to be 0.48 $\mu$erg/cm (203 meV A$^2$), while for Co$_2$FeAl the corresponding values of 1.55 $\mu$erg/cm (370 meV A$^2$) were found. The observed asymmetry in the BLS spectra between the Stokes and anti-Stokes frequencies was assigned to an interplay between the asymmetrical profiles of hybridized Damon-Esbach and perpendicular standing spin-wave modes, combined with the optical sensitivity of the BLS signal to the upper side of the CCFA or Co$_2$FeAl film.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-10-05 |