Magnetic field microprobe in superconductors carrying a current

Rectangular normal domains in current-carrying superconductors

We find a type of normal domain in composite superconductors—a traveling rectangular domain. Using the effective circuit model we study in detail the dynamics of this domain. We derive an analytical solution for the propagation velocity and the length of a traveling rectangular domain. Current–voltage characteristics are calculated for a superconductor with a rectangular domain. © 1998 American...

Comparing a current-carrying circular wire with polygons of equal perimeter: Magnetic field versus magnetic flux

Calculation of the Magnetic Field Intensity in a Rectangular Conductor Carrying Current in Electromagnetism Introductory Courses

This paper describes a type of didactic material used when teaching electromagnetism. The purpose is to guide the students to verify the results of a Finite Element (FE) simulation using those obtained analytically. This procedure has shown to be of great help during their learning of the FE method. The example in this paper uses a 2D analytical method to estimate the magnetic field generated b...

Spin-ordering quantum transitions of superconductors in a magnetic field.

We argue that recent neutron scattering measurements by Lake et al. [Science 291, 1759 (2001)] of the spin excitation spectrum of La(2-delta)Sr(delta)CuO4 in a magnetic field can be understood in terms of proximity to a phase with co-existing superconductivity and spin density wave order. We present a general theory for such quantum transitions, and argue that their low energy spin fluctuations...

SO„5... superconductors in a Zeeman magnetic field

A fundamental question one can ask in connection with high-Tc superconductors is whether they are in the same universality class of conventional d wave Bardeen-CooperSchrieffer theory ~BCS! superconductors. While many aspects of high-Tc superconductors are anomalous and quantitatively different from conventional BCS superconductors, no sharp distinction based on symmetry has been made so far. I...