title: Simultaneous imaging of magnetic field and temperature distributions by magneto optical indicator microscopy.
abstract: We report a simultaneous imaging method of the temperature and the magnetic field distributions based on the magneto optical indicator microscopy. The present method utilizes an optical indicator composed of a bismuth-substituted yttrium iron garnet thin film, and visualizes the magnetic field and temperature distributions through the magneto-optical effect and the temperature dependent optical absorption of the garnet thin film. By using a printed circuit board that carries an electric current as a device under test, we showed that the present method can visualize the magnetic field and temperature distribution simultaneously with a comparable temperature sensitivity (0.2 K) to that of existing conventional thermal imagers. The present technique provides a practical way to get a high resolution magnetic and thermal image at the same time, which is valuable in investigating how thermal variation results in a change of the operation state of a micrometer sized electronic device or material.
authors.affiliation: Department of Physics and Basic Science Institute for Cell Damage Control, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Hanju
authors.initials: H
authors.lastname: Lee
authors.affiliation: Department of Physics and Basic Science Institute for Cell Damage Control, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Sunghoon
authors.initials: S
authors.lastname: Jeon
authors.affiliation: Department of Physics, Sam Houston State University, Huntsville, TX 77341, USA.
authors.forename: Barry
authors.initials: B
authors.lastname: Friedman
authors.affiliation: Department of Physics and Basic Science Institute for Cell Damage Control, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Kiejin
authors.initials: K
authors.lastname: Lee