Preparation of Bi-YIG particles for display devices

Abstract

Garnet fme particles are prepared by coprecipitation. The saturation magnetization of the particles increases as the annealing temperature increases. Almost all X-ray diffraction peaks from the particles annealed at 700 "c for l h are assigned to garnet. The prepared particles are classified in order to remove the aggregated large particles which are considered to prevent passing of light. The coercive force lowers to half of the initial value after the classification. Faraday rotation of the particles which are dispersed into methylene iodide is confirmed under a polarization microscope. Faraday rotation of the film coated of the particles are shown as a function of wavelength.

The effect of Bi mole ratio on phase formation in Bi x Y 3− x Fe 5 O 12 nanoparticles

“…Among the magnetic materials, polycrystalline yttrium iron garnets and substituted ones have received a great deal of attraction in laser, microwave devices and magneto-optics. Bi-substituted garnets are suitable materials for use in magneto-optical discs and also magneto-optical display devices [2].…”

Study on magnetic role of Bi3+ ion by random cation distribution model in Bi–YIG system

“…This is due to difference in degree of covalancy of -Fe O band at a and d sites. In ionic-covalent bands, 3 Fe  ion has 5 34 ds  electronic configuration rather than 3d 5 . The more covalency at the tetrahedral site increase 4s  electron density at the nucleus and hence the more IS is observed for a sites compare to d sites [42].…”

“…Over the past decades Bi-YIG had been extensively studied not only for its application in microwave and magneto-optical devices but also because of its anomalous magnetic behavior [1][2][3][4][5][6][7]. It is well known that the crystal structure of YIG is cubic with space group 10 3.…”

Crystallization behavior of Bi1.25Y1.75Fe5O12 prepared by coprecipitation process

“…This is because they have a single magnetic domain. Polycrystalline YIG and substituted YIG have attracted much attention for microwave device and magnetooptical applications [7]. The conventional method of producing these materials is by the solid-state reaction with oxide/ carbonate and then calcining at a high temperature (!1200 8C).…”