期刊
APPLIED PHYSICS LETTERS
卷 110, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4973991
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资金
- Boeing Company
- Engineering and Physical Sciences Research Council [EP/P00962X/1]
- EPSRC [EP/H049657/1, EP/P00962X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/P00962X/1, EP/H049657/1] Funding Source: researchfish
A trapped magnetic field of greater than 3 T has been achieved in a single grain GdBa2Cu3O7- (delta) ( GdBaCuO) bulk superconductor of diameter 30mm by employing pulsed field magnetization. The magnet system is portable and operates at temperatures between 50K and 60 K. Flux jump behaviour was observed consistently during magnetization when the applied pulsed field, Ba, exceeded a critical value ( e. g., 3.78 T at 60K). A sharp dB(a)/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. Published by AIP Publishing.
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