# Characteristics of Superconductors

1. Mar 16, 2008

### Phrak

What are the permeability and permissivity of type I superconductors?

2. Mar 19, 2008

### Phrak

Type I superconductors expell magnetic fields as they pass below critical temperature.

I think this means that an impressed field H would result in a magnetic field,
$$B=H \mu =0$$ , so that mu is zero.

I dont know about the permissivity $$\epsilon$$.