| 摘要 |
PURPOSE:To prevent the attenuation of magnetization due to flux leap. CONSTITUTION:The superconductive state of the title superconductive bulk magnet is established by cooling down step in non-magnetic field. Later, the superconductive bulk magnet is magnetized by impressing with a magnetic field to be demagnetized. At this time, the magnetizing rate and demagnetizing rate are to be accelerated up to the rate exceeding the flux leaping rate. Through these procedures, the temperature of the semiconductive bulk magnet is raised but to be cooled down after finishing the magnetizing step to the temperature before starting the magnetizing step thereby enabling the attenuation of the magnetization of the bulk magnet due to the flux leap to be avoided. |
