Bibliographic Details
| Title: |
Trapped magnetic field in a (NdFeB)–(MgB2) pair-type bulk magnet. |
| Authors: |
Aldica, Gheorghe1, Burdusel, Mihail1,2, Badica, Petre1 badica2003@yahoo.com |
| Source: |
Physica C. Oct2014, Vol. 505, p18-23. 6p. |
| Subjects: |
Magnetic fields, Superconducting magnets, Permanent magnets, Magnetic flux, Polarity (Physics), Axial flow |
| Abstract: |
Superconducting bulk discs, S, of 20 mm in diameter and 3.5 or 3.3 mm thickness of MgB 2 (pristine or added with cubic BN, respectively) with density above 97% were prepared by Spark Plasma Sintering. Discs were combined in a pair-type sandwich-like arrangement with a permanent NdFeB axially magnetised magnet, PM (∼0.5 T). Measurement of the trapped field, B tr , with temperature, time, and the reduction rate of the applied magnetic field was performed using a Hall sensor positioned at the centre between the superconductor and the permanent magnet. It is shown that the permanent magnet with certain polarity favors higher trapped field of the superconductor owing to suppression of flux jumps specific for high density MgB 2 samples. The B tr of the PM–S pair was 2.45 T (20 K) and 3.3 T (12 K). [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
