“…For the preparation method of La 1−x A x MnO 3 films, such as RF-sputtering technique [7], plasma deposition [8], pulsed laser deposition [9], screen-printing [10,11], MOCVD (Metallo-Organic Chemical Vapor Deposition) [12], FAVD [13] and the sol-gel method have all been successfully used. As one of the most frequently used method for ceramic film or coating, the sol-gel method has several advantages, such as excellent homogeneity, easy control of film thickness, ability to coat large and complex shapes, simple and low-cost processing, etc., [14].…”