The influence of oxygen pressure on the crystallographic structure and magnetic properties of Ba M films on Al2O3 （0001） substrate
摘要：In this work, hexagonal barium ferrite thin films have been deposited on Al2O3（0001） substrates by pulsed laser deposition. The oxygen pressure dependence of crystallographic structure and magnetic properties has been studied. X-ray diffraction θ-2θ reveals the films have a good c-axis orientation perpendicular to the film plane under low oxygen pressure. It is also observed from scanning electron microscope that grain shape in the film surface was changed with the increase of oxygen pressure. Magnetic hysteresis loops show the saturation magnetization（Ms）, remanence（Mr） is greatly depended on the oxygen pressure. Consequently, films deposited at 0.08 Pa have the highest Ms of 3900 Gs and Mr/Ms of 74.5% which are comparable with the theoretical value of Ba M bulk.
International Conference on Civil,Architectural,Structural and Constructional Engineering（ICCASCE 2016）
基础科学; 工程科技Ⅰ辑; 工程科技Ⅱ辑
物理学; 材料科学; 电力工业