New magnetic phenomenon in platinum
Research at the KTH Div. of Applied Material Physics has demonstrated that under special conditions platinum, one of the precious metals, may become magnetic, despite its normally being non-magnetic. This may become a useful discovery in connection with research in spintronics.
Jointly with research teams from both Italy and the Argentine, KTH researcher Anna Delin har performed quantum-mechanical computations on some very thin threads of platinum in nanosize; this reveals that such threads may sometimes become magnetic.
Such magnetism may also disappear by just turning the spin into another direction. This new effect is referred to as Colossal Magneto-Anistrophy, CMA, which may become of interest in practical applications of spintronics.
– We are trying to understand the basic magnetic properties of nanosystems, says Anna Delin. They do not act the way ordinary magnets do – nor do they act like isolated atoms. Their behaviour is entirely different and more sophisticated. This, we think, may become very useful, both in spintronics and other innovations.
By way of applying nanosize technology to magnetic substances, extra-powerful magnets or magnets with various new properties may be designed. This could be employed in building stronger electric motors; other applications may lead to more energy-saving refrigerators and air conditioners.
This research will be accounted for in more detail in the January issue of the renowned periodical Nature Nanotechnology; its cover even has a photo from the project work.
Olle Blomqvist