| 摘要 |
A bar magnet is provided comprising a billet of superconducting material in a superconducting condition and having an established magnetic field. The bar magnet is formed by exposing the billet of superconducting material to a magnetic field of the desired extent and shape while the superconducting material is above its critical temperature. While being exposed to the magnetic field, the billet of superconducting material is lowered to its critical temperature so as to stabilize the intensity and pattern of the field. The magnetic field is them removed from the billet of material and the billet maintained at or below the critical temperature.
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