1. A portable magnetic field of >3 T generated by the flux jump assisted, pulsed field magnetization of bulk superconductors
- Author
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John H. Durrell, Kaiyuan Huang, Difan Zhou, Anthony R. Dennis, John R. Hull, Mark D. Ainslie, David A. Cardwell, and Yunhua Shi
- Subjects
010302 applied physics ,Superconductivity ,Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,Field (physics) ,Condensed Matter - Superconductivity ,Flux ,Critical value ,01 natural sciences ,7. Clean energy ,Magnetic flux ,Magnetic field ,Magnetization ,Magnet ,0103 physical sciences ,010306 general physics - Abstract
A trapped magnetic field of greater than 3 T has been achieved in a single grain GdBa2Cu3O7-{\delta} (GdBaCuO) bulk superconductor of diameter 30 mm by employing pulsed field magnetisation (PFM). The magnet system is portable and operates at temperatures between 50 K and 60 K. Flux jump behaviour was observed consistently during magnetisation when the applied pulsed field, Ba, exceeded a critical value (e.g. 3.78 T at 60 K). A sharp dBa/dt is essential to this phenomenon. This flux jump behaviour enables the magnetic flux to penetrate fully to the centre of the bulk superconductor, resulting in full magnetization of the sample without requiring an applied field as large as that predicted by the Bean model. We show that this flux jump behaviour can occur over a wide range of fields and temperatures, and that it can be exploited in a practical quasi-permanent magnet system., Comment: 8 pages, 4 figures. Accepted for publication in APL
- Published
- 2017