Manipulation of magnetic-flux landscapes in superconducting Bi 2 Sr 2 CaCu 2 O 8 + δ crystals
2006; Institute of Physics; Volume: 76; Issue: 6 Linguagem: Inglês
10.1209/epl/i2006-10411-3
ISSN1286-4854
AutoresDavid J. Cole, S. J. Bending, Sergey Savel’ev, T. Tamegai, Franco Nori,
Tópico(s)High-pressure geophysics and materials
ResumoWe demonstrate experimentally that the micromagnetic profile of the out-of-plane component of magnetic induction of layered superconductors, Bz, can be manipulated by varying the in-plane magnetic field, H∥. Moving Josephson vortices, confined between layers, drag pancake vortex stacks carrying out-of-plane flux, and the magnetic profile, Bz(x), can be controllably shaped across the entire sample. Depending on the magnetic history and temperature we can increase or decrease the out-of-plane flux density at the center and near the edges of the crystal by as much as 40%, realising both "convex and concave magnetic flux lenses". Our experimental results are well described by molecular dynamics simulations.
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