Large magnetoresistance in La2/3Ca1/3MnO3 thin films induced by metal masked ion damage technique

Abstract

e have developed a simple process to obtain large magnetoresistance (MR) in perovskite manganite thin films by a combination of focused ion beam (FIB) milling and 120 keV H${}_2^{+}$ ion implantation. Metal slits about 70 nm in width were printed by 30 kV focused Ga ion beam nanolithography on a 4 mm track, and the materials in these slits are then irradiated by the accelerated H${}_2^{+}$ ions. Using this method, in a magnetic field of 5 T we can get a MR$>$60% over a 230 K temperature scope, with a maximum value of 95% at around 70 K. This technique is very promising in terms of its simplicity and flexibility of fabrication and has potential for high-density integration.

arXiv comment3 pages, 5 figures