Optical and surface properties of LiFePO4 thin films prepared by RF magnetron sputtering Şenay Volkan, Soner Özen, Suat Pat and Şadan Korkmaz Eur. Phys. J. D, 69 3 (2015) 76 Published online: 17 March 2015 DOI: 10.1140/epjd/e2015-50847-7