Magnetic field and magnetic domain structure imaging with spectroscopic probe for the development of magnetic material of electric car motors

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H02255
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Tohoku University
• Principal Investigator: Saito Shin 東北大学, 工学研究科, 教授 (50344700)
• Research Collaborator: MEGURO SAKAE ネオアーク株式会社, 部長代理
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 磁気カー効果 / 磁区観察 / 磁界検出 / 磁気光学スペクトル / CMOSイメージセンサ

Outline of Final Research Achievements

For development of high performance electric car motors consisting of permanent magnets and thin magnetic ribbons to reduce environment load, a spectroscopic imaging system with a magneto-optical probe for a magnetic domain structure and a spatial magnetic field distribution was successfully realized. Established and combined techniques were as follows; (1) visualization of the dynamics of magnetic domain structure for samples with scratches by real-time processing of differential-polarization images with two analogue cameras, (2) analysis of the three-dimensional local magnetization components due to imaging with the oblique incidence from the opposite directions, (3) high sensitivity imaging by a backside-illuminated CMOS camera, and (4) detection of magneto-optical spectra by using an imaging device.

Free Research Field

磁性薄膜工学、磁気光学材料