Differences in properties of thin films of La0.73Ca0.27MnO3 grown on SrTiO3 or LaAlO3 by sputter deposition

摘要

Abstract: We have investigated the differences in (magneto-)resistance, magnetism and morphology of thin films of La$-0.73$/Ca$- 0.27$/MnO$-3$/, grown by sputter deposition in high oxygen pressure on substrates of either SrTiO$-3$/ or LaAlO$-3$/. We find that growth on SrTiO$-3$/ is epitaxial and sooth, in contrast to growth on LaAlO$-3$/, where islands are formed at low coverage, leading to rough and disordered films at higher coverage. This type of deposition appears to lead to different film morphology than films grown by laser ablation. !10