On Thu, 29 Sep 2011, Alexandre Souza - Listas wrote:
How to get
them to you intact is another question. I don't trust shipping
magnetics anymore.
Envolve them in aluminium paper :)
Umm, no. Aluminum has a relative permeability > 1, so wrapping the disks
in aluminum will make them a tiny bit _more_ susceptible. You'd want to
wrap them in a superconductor, or faling that a very thick layer of
bismuth :-) Practically speaking, you should just put the disks securely
in the center of a box significantly larger than themselves.
Alexey