Visualization of the magnetic field distribution for a direct current by using the magneto-optical effect

초록

We studied the visualization of the magnetic field distribution on patterned current wires (DC) by using the magneto-optical (MO) imaging method with a Bi:YIG sensor film produced by metal organic decomposition (MOD). The Bi:YIG thin film was produced by spin coating, drying and pre-annealing after a Bi<inf>1</inf>Y<inf>2</inf>Fe<inf>5</inf>O<inf>12</inf> solution had been distributed uniformly on glass . An amorphous phase of the metal-oxide thin film was obtained by using repeated spin coatings, dryings and preannealings. The observed detectable minimum magnetic field of the garnet sensor film was about 0.2 Gauss. To increase the quality of MO images, we used the DC voltage modulation technique instead of the polarizer modulation method. The measured magnetic field distribution on the direct wire was compared with that of simulation.

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