Magnetic Garnet Thick Films Deposited with Aerosol Deposition Method for Optical Isolator

Abstract

Bismuth-substituted yttrium iron garnet (Bi:YIG, Bi0.5Y2.5Fe5O12) films have been deposited with aerosol deposition method. We investigated the deposition rate, crystallinity, magnetic and optical properties dependent on carrier gas flow rate (0.5 L/min ~ 8 L/min) and annealing temperature. With increasing annealing temperature, the crystallinity of Bi:YIG film was improved and the saturation magnetization increased to reach to 1.1 kG at 800 C. The magneto-optical effect, Faraday rotation, increased to 1.4 deg/ m by annealing at 700 C around the wavelength of 0.5 m. The optical transmittance of the Bi:YIG film was also improved in visible region.

On the fabrication of one-dimensional magnetophotonic crystals from various oxides and metal–organic decomposition-made Bi0.5Y2.5Fe5O12

“…It is worth mentioning the following: (a) the reflexes Bi:YIG were shifted to smaller angles and (b) another crystal phase was also grown that was defined as yttrium oxide (Y 2 O 3 ); the (222) and (440) reflexes were clearly observed in the vicinity of 30 and 50 degrees. Result (a) corresponds well with data demonstrated in [61][62][63], illustrating an expansion of the garnet crystal unit cell. Dielectric constants of the fabricated Bi:YIG, together with referenced data from [64] and [65], are shown in figure 3.…”