Pure and fully texturized Sr_2FeMoO_6 thin films prepared by pulsed laser deposition from target made with citrate-gel method

摘要

Sr_2FeMoO_6 (SFMO) thin films were grown on SrTiO_3 and MgO single crystal substrates by pulsed laser deposition. The SFMO target with nanometer sized grains for the film preparation was made from powder prepared by citrate-gel method. The parameters for ablation were optimized and the importance of the substrate temperature is observed. Film quality was verified with various X-ray diffraction methods and magnetometric measurements. The films are pure, without impurities such as metallic iron, Fe_2O_3, SrMoO_3 or SrMoO_4 and they are completely c-axis oriented. The Curie temperature for the films is higher than room temperature.