The Effect of the composite HTSC on the Magnetic Levitation and the Magnetic Friction

• Main Authors: Chien Shih Shen, 簡碩伸
• Other Authors: Chen Wai Ching
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/91211030073851268062

碩士 === 淡江大學 === 物理研究所 === 81 === This thesis explores magnetic levitation and magnetic friction of the different compound kinds of Y123 HTSC bulks at 77K and cylindrical ferromagnets contained lanthanide. About samples, according the difference of compound kinds, we assorted the samples to two kinds of superimposition and half-cutted. The superimpositon is called that put a sample above other one directly. And the half-cutted is called that use a semicircular sample and the other one to make up a circular sample. About magnetic levitation, use the useful electric balance to measure the hystersis curvilinear relation between magnetic levitation and displacement (between magnets and superconductors) . Use the bulks made up the compound kinds of superimposition and half-cutted to compare the function figures of before and after made. We found that the bulks used the spuperimpostion kind to make up that the magnetic levitation is the same as the same thickness samples. But the bulk used the half-cutted kind to make up that the manetic levilation is smaller than the bulk uncutted. About magnetic friction, use the homemade pendulum to measure the torque generating by magnets rotate from the leaving-axis to the superconductor bulks. Then use the bulks made up the above two kinds to compare the function figures of before and after made. We found that at sttronger magnetic field (above 130 Gauss) the bulks used the spuperimpostion kind to make up that the magnetic friction torque increases than the same thickness samples. But the bulks used the half-cutted kind to make up that the manetic friction is the same as the bulks uncutted.