Construction of a multi-functional analyzer with magneto-optical probe system for the development of magnetic material of electric car motors

为了快速研制出可减轻环境负荷的国家战略物资永磁体和薄带材料，研制了磁光探头功能分析系统。首先，我们成功地建立了以下技术：(1)通过成像板可视化磁性材料的泄漏磁场的空间分布，以及(2)通过一次磁场扫描从局部区域光谱检测磁光效应谱(波长与旋转角和椭圆度的关系)。然后，将这些技术与磁性材料磁域中局部磁矩方向的可视化技术相结合，完成了该评价系统。

In order to rapidly develop the national strategic materials used for permanent magnet and thin magnetic ribbons which could reduce the environment load, a functional analysis system with magneto-optical probe was developed. First, we had successfully established the following techniques; (1) visualization of the spatial distribution of the leak magnetic field from a magnetic material by an imaging plate, and (2) spectroscopic detection of magneto-optical effect spectrum (wave length dependence of rotation angle and ellipticity) from local area with a single sweep of the magnetic field. Then, this evaluation system was completed with combining these techniques with a technique of visualization of local magnetic moment direction in magnetic domain of the magnetic material.