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Instability of a superconducting line vortex

✍ Scribed by G. Richardson

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
816 KB
Volume
110
Category
Article
ISSN
0167-2789

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✦ Synopsis

We show that a rectilinear superconducting line vortex lying in a current with non-zero component along its axis is unstable to small helical perturbations. The study of exact and numerical solutions for the nonlinear evolution of such perturbations leads us to make some conjectures about the growth of the instability. These results are then used to demonstrate that curvature (or line tension) may not be neglected even for a vortex line which is initially nearly straight.

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The interaction between a straight vortex line in a superconducting film and a soft nanomagnet, either a nanodisk or nanoring in the magnetic vortex state, in the presence of a magnetic field is studied theoretically in the London limit using linear response theory of elementary magnetism. It is fou