A method and apparatus for treating material surfaces using a repetitively pulsed ion beam. In particular, a method of treating magnetic material surfaces in order to reduce surface defects, and produce amorphous fine grained magnetic material with properties that can be tailored by adjusting treatment...http://www.google.de/patents/US5532495?utm_source=gb-gplus-sharePatent US5532495 - Methods and apparatus for altering material using ion beams
