Abstract
The elementary dielastic interaction force (δE effect) between crystal dislocations (screw and edge dislocations) and one flux line as well as the flux line lattice is investigated by means of the phenomenological Ginzburg—Landau theory. The dependence of the maximum pinning force on the reduced induction b ≡; B/B c2 is calculated. It turns out that the dielastic pinning force increases with decreasing coherence length ξ, p δE ∫ 1/ ξ and therefore becomes especially large for the technologically important high-field superconductors. Numerical values for the maximum pinning force are presented for Nb and Nb3Sn.
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