Physics – Condensed Matter – Superconductivity
Scientific paper
2001-07-16
Physics
Condensed Matter
Superconductivity
The compiled TeX document length is 10 pages. Two figures (one page each) are also included The paper is accepted for publicat
Scientific paper
10.1103/PhysRevLett.87.127004
Coarse-grained flux density profiles in type-II superconductors with non-parallel vortex configurations are obtained by a proposed phenomenological least action principle. We introduce a functional $C[H(x)]$, which is minimized under a constraint of the kind $J$ belongs to $Delta$ for the current density vector, where $Delta$ is a bounded set. This generalizes the concept of critical current density introduced by C. P. Bean for parallel vortex configurations. In particular, we choose the isotropic case ($Delta$ is a circle), for which the field penetration profiles $H(x,t)$ are derived when a changing external excitation is applied. Faraday's law, and the principle of minimum entropy production rate for stationary thermodynamic processes dictate the evolution of the system. Calculations based on the model can reproduce the physical phenomena of flux transport and consumption, and the striking effect of magnetization collapse in crossed field measurements.
Badia Antonio
Lopez Cristobal
No associations
LandOfFree
Critical state theory for nonparallel flux line lattices in type-II superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Critical state theory for nonparallel flux line lattices in type-II superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Critical state theory for nonparallel flux line lattices in type-II superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-472699