LONDON PENETRATION DEPTH
Definition
<LONDON PENETRATION DEPTH> is a <DEPTH> that the field penetrates the superconductorin when an applied magnetic field is parallel to the plane <SURFACE> of a semi-infinite superconductor, according to the expression B(x) = B(0).exp(-x/lambda_L) where B is <MAGNETIC FLUX DENSITY> and x is A <DISTANCE> from the surface