Investigation of pinning centres in superconductors by means of alternating currents. I. Theory
- 1 May 1972
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 2 (3), 547-558
- https://doi.org/10.1088/0305-4608/2/3/022
Abstract
The interaction between the fluxon lattice and a random array of pinning sites can be analyzed with the help of a simple model. The critical current calculated from the model corresponds to the more refined calculation of Labusch (1969). The model is used to analyse the response of a fluxon lattice to very small forces. It is shown that the displacement of the fluxon lattice is reversible and linear in the applied force up to a certain maximum displacement. Measurement of the displacement due to small forces can be performed by measuring the electric field in a slab carrying a small alternating current. Such measurements can yield useful information about pinning centres.Keywords
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