Faraday rotation and sensitivity of (100) bismuth-substituted ferrite garnet films

Abstract

We have investigated the Faraday rotation of in-plane magnetized bismuthsubstituted ferrite garnet films grown by liquid phase epitaxy on (100) oriented gadolinium gallium garnet substrates. The Faraday spectra were measured for photon energies between 1.7 -2.6 eV. To interprete the spectra, we use a model based on two electric dipole transitions, one tetrahedral and one octahedral. Furthermore, the Faraday rotation sensitivity was measured at 2.3 eV, and found to be in good agreement with the theoretical predicitions. In particular, we find that the sensitivity increases linearly with the bismuth content and nonlinearly with the gallium content.

Exact asymptotic behavior of magnetic stripe domain arrays

“…Finally, the substrate was dipped into the melted for 8 minutes resulting in a macroscopically uniform ferrite garnet film (FGF) grown on one side of the substrate, see Ref. 28 for more details. A nearly square plate of area A = 21 mm 2 was selected for measurements.…”

Nd3-xBixFe4GaO12(x = 2, 2.5) films on glass substrates prepared by MOD method

“…Therefore, bismuth-substituted rare-earth iron garnets have been used for applications such as optical isolators, spatial light modulators and magnetooptical indicator films 8,9 . It is well known that the rare-earth iron garnets tend to have perpendicular magnetic anisotropy for the films prepared both on gadolinium gallium garnet (GGG) and glass substrates for low bismuth content x < 1.…”

Optical Writing and Erasing of Magnetic Domain Patterns on a Ferrite-Garnet Film

“…In this work, we use ferrite-garnet films (FGFs), where the Faraday rotation is enhanced for visiblelight wavelengths by the presence of Bi in the garnet lattice . The composition, (BiYTmGd) 3.0 (FeGa) 5.0 O 12.0 , and the film growth parameters for our FGF samples have been optimized to obtain large coercivity and high saturation magnetization, which ensures stability of the recorded domain patterns and enables use of these patterns for creating well localized magnetic fields. Such fields have been used by us for trapping of gaseous samples of laser-cooled atoms 19) .…”