Magneto-Optical Imaging System to Study Vortex Dynamics in High-Tc Superconductor Devices

K. Ueno ； I. Kawayama ； H. Murakami ； M. Tonouchi ； N. Chikumoto

《Chinese Journal of Physics》 42卷4S期 (2004/08) Pp. 567-571

並列摘要

Magneto-optical imaging system was fabricated to observe magnetic field distribution in a high-Tc superconducting device. The performance of the fabricated system was checked by the preliminary experiments using a magnetic stripe card at room temperature and Bi2Sr2CaCu2O8+δ (BSCCO) single crystal at 80K. In the measurements using BSCCO, we have succeeded in the observation of magnetic flux line distribution with a spatial resolution of about 2.5 μm. Furthermore, a characteristic one-dimensional alignment of magnetic fluxes line along the crystal a-axis was observed in a half-peeled thin BSCCO flake region.