Electromagnetic behavior on high-temperature superconducting bulk YBCO exposed to time-varying magnetic field

M. Tsuda, T. Susa, T. Ohyama, A. Ishiyama, S. Kohayashi, S. Haseyama

Research output: Contribution to journalConference article

8 Citations (Scopus)


We present results of comprehensive study of electromagnetic behavior of high-temperature superconducting bulk YBCO exposed to time-varying magnetic field. The characteristic of trapped magnetic flux is one of the key factors in application of high-temperature superconducting bulk, such as magnetic levitation system, rotor of motor and bulk magnet. Especially, time inconstancy of trapped flux, such as flux creep, is undesirable for its application system. The relationship between time-varying external magnetic field and trapped flux is investigated experimentally using field-cooled (FC) YBCO 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 field-cool process on trapped flux is also investigated experimentally.

Original languageEnglish
Pages (from-to)894-897
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number1
Publication statusPublished - 2000 Jan 1
EventThe 16th International Conference on Magnet Tehnolopgy - Tallahassee, FL, USA
Duration: 1999 Sep 261999 Oct 2


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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