Abstract
Spatially nonuniform fluctuations of external magnetic field are typically present in applications of superconductors as magnetic bearings and shields. We use the Bean critical-state model to analyze penetration of such alternating fields into type-II superconductors. Simple asymptotic solutions are found for infinite slab configuration and low penetration depth of the magnetic field. To calculate AC losses, we use a vector potential formulation. The solutions obtained are tested by numerical simulations, based on a variational reformulation of the critical-state problem, and by experiments. A BSCCO superconducting bulk specimen with power law voltage-current characteristic was used in experiments.
Original language | English |
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Pages (from-to) | 645-646 |
Number of pages | 2 |
Journal | Physica C: Superconductivity and its Applications |
Volume | 408-410 |
Issue number | 1-4 |
DOIs | |
State | Published - 1 Aug 2004 |
Event | Proceedings of the International Conference on Materials - Rio de Janeiro, Brazil Duration: 25 May 2003 → 30 May 2003 |
Keywords
- Bean model
- Spatially nonuniform fluctuations
- Type-II superconductors
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering