Abstract
We developed a shielding current distribution model in a bulk superconductor with the aim of estimating the levitation force. First, we directly measured the magnetic field in axial and radial directions above a bulk Y-Ba-Cu-O superconductor levitated by an electromagnet using a three-dimensional Hall sensor. We then calculated the field distribution by assuming two types of the shielding current distributions and compared the results with the measured values. The field distributions based on the model in that the shielding currents are flowing concentrically at the surface were not in good agreement with the measured data. We then assumed that the shielding currents are not uniform and the boundary has the form of nth hyperbola, which could reproduce the measured field distribution reasonably well.
| Original language | English |
|---|---|
| Pages (from-to) | 731-738 |
| Number of pages | 8 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 426-431 |
| Issue number | I |
| DOIs | |
| Publication status | Published - 2005 Oct 1 |
| Event | Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25 |
Keywords
- Bulk superconductor
- Levitation
- Shielding current distribution
- Y-Ba-Cu-O
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering