We present results uf comprehensive study of electromagnetic behavior of hightemperature superconducting bulk YUCO exposed to timevarying magnetic field. The characteristic of trapped magnetic flux is one of the key factors Inapplication of hightemperature superconducting bulk, such us magnetic lévitation system, rotor of motor and bulk magnet. Especially, time inconstancy uf trapped flux, such as flux creep, Is undesirable for its application system. The relationship between timevarying external magnetic field and trapped flux is investigated experimentally using fieldcooled (FC) YHCO disk. Magnetic flux density just above the disk is measured by Hall probes lined up along the disk radius. The magnetic field decay which may be independent of flux creep is observed in the experiment and is influenced significantly by frequency and amplitude of AC external magnetic field. The effect of changing rate of applied magnetic field in fieldcool process on trapped flux is also investigated experimentally.
|Number of pages||1|
|Journal||IEEE Transactions on Applied Superconductivity|
|Publication status||Published - 2000 Mar 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering