Journal ArticleDOI
Magneto-optic spectra and the dielectric tensor elements of bismuth-substituted iron garnets at photon energies between 2.2-5.2 eV
TLDR
In this article, optical and magneto-optical measurements have been performed at room temperature on both polycrystalline samples and thin single-crystal films of bismuth-substituted iron garnets.Abstract:
Optical and magneto-optical measurements have been performed at room temperature on both polycrystalline samples and thin single-crystal films of bismuth-substituted iron garnets. Kerr rotation, ellipticity, and reflectivity are given for polycrystalline samples of composition ${\mathrm{Y}}_{3\ensuremath{-}x}{\mathrm{Bi}}_{x}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ ($0lx\ensuremath{\le}1$) between 2.0 and 5.2 eV (wavelengths between 0.6 and 0.24 \ensuremath{\mu}m). The absorption and the Faraday rotation and ellipticity of epitaxial films with $0lxl0.5$ were measured up to 3.5 eV. The experimental results have been used to calculate the diagonal and off-diagonal elements of the dielectric tensor at optical frequencies. Strong magneto-optic active transitions have been found at 2.8, 3.3, 4.1, and 4.9 eV, apart from the weaker crystal-field transitions. The bands at 2.8 and 3.3 have been studied in more detail: The oscillator strengths and splittings due to spin-orbit coupling were calculated, both increase with bismuth substitution. The large splitting of the band at 3.3 eV for the bismuth-substituted compounds is concluded to be the origin of the anomalous Faraday rotation of these compounds. The assignment of these bands in terms of an energy level scheme is discussed.read more
Citations
More filters
Journal ArticleDOI
Magnetic and magneto-optical properties of garnet films
P. Hansen,J.-P. Krumme +1 more
TL;DR: In this article, a review of magnetic and magneto-optical work devoted to lead and bismuth-substituted iron garnet films is presented, where the influence of these ions on the saturation magnetization, compensation temperature, uniaxial anisotropy, refractive index, optical absorption, Faraday rotation and ellipticity and Kerr rotation and ellipsis is discussed with respect to the composition and temperature dependence.
Journal ArticleDOI
Surface plasmon resonance enhanced magneto-optics (SuPREMO): Faraday rotation enhancement in gold-coated iron oxide nanocrystals.
TL;DR: Enhanced optical Faraday rotation in gold-coated maghemite (gamma-Fe(2)O(3)) nanoparticles is reported and may enable design of nanostructures for remote sensing and imaging of magnetic fields and for miniaturized magneto-optical devices.
Journal ArticleDOI
Magnetic and magneto-optic properties of lead- and bismuth-substituted yttrium iron garnet films
P. Hansen,K. Witter,W. Tolksdorf +2 more
TL;DR: In this article, the saturation magnetization, optical absorption, and the Faraday rotation were investigated on flux-grown crystals for a single-ion theory and the concentration dependence of these properties was shown to be linear.
Journal ArticleDOI
Spin transfer torque on magnetic insulators
TL;DR: The spin mixing conductance G↑↓ of the interface between silver and the insulating ferrimagnet Yttrium Iron Garnet (YIG) is dominated by its real part and of the order of 1014 Ω−1/m−2, i.e. close to the value for intermetallic interface as mentioned in this paper.
Journal ArticleDOI
Magnetooptic properties and applications of bismuth substituted iron garnets
G. Scott,D. Lacklison +1 more
TL;DR: In this paper, a review of the progress achieved in the understanding of the origin of the large bismuth induced magnetooptic effects in iron garnets is made, and optical efficiencies are determined by the ratio of Faraday rotation (θ) to optical absorption (α).
Related Papers (5)
Ultraviolet Magneto-Optical Properties of Single-Crystal Orthoferrites, Garnets, and Other Ferric Oxide Compounds
Magnetic circular dichroism and Faraday rotation spectra of Y 3 Fe 5 O 12
Magnetic and magneto-optic properties of lead- and bismuth-substituted yttrium iron garnet films
P. Hansen,K. Witter,W. Tolksdorf +2 more