Effect of oxygen partial pressure in the La-Sr-Mn-O granular thin films

Summary form only given. Recently a great deal of attention has been focused on the magnetoresistance (MR) properties of manganese perovskite. In most cases the large resistance changes are achieved only in a strong field in the Tesla range, thus severely limiting their practical utility. So many researchers have been studied low field magnetoresistance materials[1],[2]. We present the sputtering conditions dependent of microstructures, surface charactristics, magnetic and low-field MR properties of La-Sr-Mn-O granular thin films.