Sculpting microscopic magnetic flux landscapes in a BSCCO2212 vortex lens
D. Cole, S. J. Bending, S. Savelev, T. Tamegai, F. Nori
Abstract
We demonstrate experimentally that the micromagnetic profile of the out-of-plane component of magnetic induction, Bz, in the crossing lattices regime of layered superconductors can be manipulated by varying the in-plane magnetic field, H||. Moving Josephson vortices drag/push pancake vortex stacks, and the magnetic profile, Bz(x), can be controllably sculpted across the entire single crystal sample. Depending on the H-history and temperature we can increase or decrease the 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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