本論文的主要目的在研究高溫超導體YBCO在不同磁浮高度與不同溫度下，與磁摩擦力的關係。經由探討所得到的數據，磁摩擦力與磁浮高度有關。高度愈低，磁場在超導體的強度愈強且其變化量也愈大，總能量之耗損也比較大，磁摩擦力就愈大。 The main objective of this project is to study the behavior of different levitation height of a rotate permanent magnet levitates above a high-temperature superconductor YBCO versus fricitional force under different temperatures .From our experimental data,we found that magnetic frictional force is a function of the the levitation height .Smaller height corresponds to stronger intensity and larger change amount of the magnetic field inside the superconductor .That means more energy lost and large magnetic frictional force .
