Growth of La_(0.7)Sr_(0.3)MnO_3 Thin-Films on SrTiO_3 (100) Substrate by Pulsed Laser Deposition: Structural, Optical and Electrical Properties

摘要

This paper reports the growth and properties of La_(0.7)Sr_(0.3)MnO_3 (LSMO) thin films on SrTiO_3 (100) perovskite single crystal substrates via pulsed laser deposition (PLD) process using Kr:F (λ = 248 nm) laser line as an exciton source. The SrTiO_3 (100) perovskite single crystal was used as substrate due to its good lattice matching with the deposited thin films (La_(0.7)Sr_(0.3)MnO_3). The LSMO thin films were deposited at without oxygen pressure and other two different oxygen pressures, i.e., at 100 mTorr and at 300 mTorr oxygen pressures. For the deposition of thin films, the target material was prepared by mixing and sintering the exact amounts of manganese oxide (Mn_3O_4), strontium oxide (SrCO_3) and lanthanum oxide (La_2O_3). Finally, a sintered pellet of La_(0.7)Sr_(0.3)MnO_3 was used as a target for the deposition of the thin films. The as-grown LSMO thin films were characterized in terms of their structural, optical and electrical properties.