Physicists have just identified a new aperiodic order in a material composed of bistable magnetic molecules. This order, which results from a modulation of the magnetic state that is incommensurate with the crystalline lattice, can be removed by a laser beam and made to reassemble when the temperature of the material is raised.
(text taken from page http://www.cnrs.fr/inp/spip.php?article1383)
http://www.cnrs.fr/inp/spip.php?article1383