Growth and Characterization of Liquid-Phase Epitaxial Bi-Substituted Iron Garnet Films for Magneto-Optic Application

Abstract

The effects of the chemical species of host rate-earth ions, melt compositions and growth orientations on the Bi-substitution level and magneto-optic properties of Bi-substituted garnet films grown by liquid-phase epitaxy were examined. For Gd3+ ions, a higher level of Bi substitution was attained than for Y3+ or Lu3+ ions, when garnet films were grown under the same growth conditions. A maximum Faraday rotation coefficient of -2880°/cm at 1.30 µm was observed in the (GdBi)3(FeAlGa)5O12 film with a Bi-substitution level of 1.56 moles per garnet formula unit. The optical absorption coefficient was as small as 1.6 cm-1 in the (GdBi)3(FeAlGa)5O12 film with a Faraday rotation coefficient of -1800°/cm; consequently, a figure of merit of 267°/dB was attained at 1.30 µm.

Tuning of the transverse magneto-optical Kerr effect in magneto-plasmonic crystals

“…Diagonal ( ) and non-diagonal (gyration g) terms of the permittivity tensor are given at photon energy 1.55 eV. properties of the garnets [42]. The bismuth substitution level can be seen to be decreasing from sample 1 to 3 in table 1.…”

Highly bismuth-substituted, record-performance magneto-optic garnet materials with low coercivity for applications in integrated optics, photonic crystals, imaging and sensing

“…Bisubstituted iron garnet thin film materials are one of the best transparent MO materials possessing the giant MO properties. Since 1960 Bi:IGs' of different compositions containing different metal dopants have been produced and their properties have been studied extensively to realise their potential in various new and existing technologies [1][2][3][4][5][6][7][8][9]. Bi:IGs are still considered to be the best materials for use in non-reciprocal optical components, magnetic recording, magnetic field sensing and imaging as well as for applications in magnetically-tunable photonic crystal devices.…”

Enhanced Magneto-Optic Properties in Sputtered Bi- Containing Ferrite Garnet Thin Films Fabricated Using Oxygen Plasma Treatment and Metal Oxide Protective Layers

“…Bismuth (Bi)-substituted garnet materials for various MO applications attract the attention of researchers in this field, aimed at developing innovative high-performance garnet materials or finding ways of improving their properties. Also, from the practical point of view, MO garnet materials of these composition types with high-performance are relevant to the context of manufacturing of next-generation ultra-fast optoelectronic devices, such as light intensity switches and modulators, high-speed flat panel displays and high-sensitivity sensors [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Therefore, it is important, nowadays, to obtain MO materials of optimized material composition stoichiometry possessing a high figure of merit and a low coercive field.…”