This is so cool. I think these videos have only been around since June 2011. The video below shows this phenomenon. It looks like magic. It is a disk that when put near a magnet gets locked into place by the magnetic lines. It appears to be floating above the magnet but if you move the magnet it stays locked in the exact position in comparison to the magnet. I would like to see what happens with an electro magnet if I change the magnetic field by upping to voltage just a little. Would it move the object or just lock it into position harder?
This video and information was published by the Superconductivity Group School of Physics and Astronomy at Tel Aviv University. In these video they demonstrate quantum locking in action. You can see what they have published about it on this website that they set up at:
The disk in the video below is a sapphire wafer coated with an ultrathin layer of yttrium barium copper oxide. It is is cooled to below negative 185 degrees Celsius by putting it in liquid nitrogen. At that temperature the material becomes superconductive. The Meissner effect states that super conductors expel all magnetic lines of flux. The thin wafer in the video below allows some lines of flux to pass through it and that makes it hold in place.