Register to reply

Amount of flux lines 'pinned' in type II superconductor

by Yakone
Tags: magnetism, superconductivity
Share this thread:
Jan24-13, 08:10 AM
P: 2
a type II superconductor may not exhibit complete exclusion of magnetic field due to quantum vortices. It is my understanding that the magnetic field present will affect the number of vortices or fluxons present, but what is the relationship between magnetic field, and number of vortices in a type II superconductor (zero-field cooled), or am I completely missing the mark?
Phys.Org News Partner Physics news on
A new, tunable device for spintronics
Researchers study gallium to design adjustable electronic components
Gadolinium-based material that can be cooled by varying magnetic field
M Quack
Jan28-13, 03:07 AM
P: 669
Graphically, you can imagine that the magnetic fields lines of the external field are "bundled" into quantized packets inside the superconductor.

The density of vortices is then such that the macroscopic flux is the same as outside of the SC, N*(flux quantum)/(macroscopic area)=B_ext, where N is the number and N/(macroscopic area) is the density of vortices.

In the absence of defects and pinning centers, the vortices may form ordered lattice. In most materials these are hexagonal, but square ones also occur. These lattices can be observed with decoration experiments, neutron scattering or electron microscopy. From the lattice parameters you can calculate the density.

Register to reply

Related Discussions
Flux tubes in a Type II Superconductor Atomic, Solid State, Comp. Physics 2
Critical field for a type I superconductor Advanced Physics Homework 0
Is there a limit to the amount of energy stored in a superconductor? Classical Physics 5
Type II Superconductor - Critical Fields Advanced Physics Homework 0
Question about Superconductor Flux Pinning Atomic, Solid State, Comp. Physics 19