Magnetic Transition of La0.8Sr0.2Mn1-xCoxO3 (x=0, 0.3, 0.5, 1.0)
来源期刊：JOURNAL OF RARE EARTHS2006年第4期
论文作者：Wang Junping Hou Bihui Sun Wei He Hong Liu Xibin Jiang Shaolin
Key words：perovskite; structure; magnetism; rare earths;
Abstract: A series of rare earth compound oxides with the formula of La0.8Sr0.2Mn1-xCoxO3 (x=0.0, 0.3, 0.5, 1.0) were prepared by the method of citric acid. Structures, figures and magnetic properties of the samples were analyzed by means of XRD, SEM and SQUID. Experiment results prove that all the samples are hexagonal, but their figures and magnetic properties are different. La0.8Sr0.2MnO3 is ferromagnetic. La0.8Sr0.2Mn0.7Co0.3O3 and La0.8Sr0.2Mn0.5Co0.5O3 are ferrimagnetic. La0.8Sr0.2CoO3 is antiferromagnetic. SEM results indicate that the structure of the first three are three-dimensional reticulations which are made up of some small ellipsoids which link up at the head and the end. The fourth sample looks like some dispersed small balls.
Wang Junping1，Hou Bihui2，Sun Wei1，He Hong3，Liu Xibin4，Jiang Shaolin2
(1.Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, China;
2.College of Applied Sciences, Beijing University of Technology, Beijing 100022, China;
3.College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China;
4.Chinese Peoples Armed Police Force Academy, Langfang 065000, China)
Abstract:A series of rare earth compound oxides with the formula of La0.8Sr0.2Mn1-xCoxO3 (x=0.0, 0.3, 0.5, 1.0) were prepared by the method of citric acid. Structures, figures and magnetic properties of the samples were analyzed by means of XRD, SEM and SQUID. Experiment results prove that all the samples are hexagonal, but their figures and magnetic properties are different. La0.8Sr0.2MnO3 is ferromagnetic. La0.8Sr0.2Mn0.7Co0.3O3 and La0.8Sr0.2Mn0.5Co0.5O3 are ferrimagnetic. La0.8Sr0.2CoO3 is antiferromagnetic. SEM results indicate that the structure of the first three are three-dimensional reticulations which are made up of some small ellipsoids which link up at the head and the end. The fourth sample looks like some dispersed small balls.
Key words:perovskite; structure; magnetism; rare earths;
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