パルスレーザを利用した磁気光学効果による磁界分布計測

Abstract

Electromagnetic interference (EMI) is a serious problem in integrated circuits. The ability to accurately measure low-intensity electromagnetic fields is necessary to overcome this problem. We developed in a previous study a system to make magneto-optical measurements that use short laser pulses and a stroboscopic method to measure magnetic-field waveforms. In this study, we considered the spatial resolution of the system and measured the magnetic field distribution around magnetic heads. The overall results suggest that the system of measurement is capable of measuring EMI if we use a thinner garnet and a higher power laser.