| 摘要 |
<p>A superconducting electromagnet of the invention does not involve difficulty in forming wire using superconducting ceramics and is free from inconvenience in regard to critical current density, and includes a seamless ring structure composed of superconducting ceramics and cooling means for cooling the ring structure until it exhibits a superconducting state. The method of magnetization comprises a step of applying an external magnetic field to cross the ring structure under the condition of a temperature at which the ring structure does not exhibit any superconducting state, a step of activating the cooling means under the condition where the external magnetic field is being applied to cool the ring structure down to a temperature at which it exhibits a superconducting state, and a step of removing the external magnetic field.</p> |
