Crystal structure and magnetic behavior of the La0.1Bi0.9FeO3 compound
来源期刊：Journal of Rare Earths2016年第4期
论文作者：姚青荣 沈逸豪 周怀营 饶光辉 邓健秋 潘顺康
文章页码：396 - 400
摘 要：The nano-crystalline La0.1Bi0.9FeO3 compound was successfully synthesized by starch-based combustion method. The crystal structure and magnetic behavior were studied by temperature-dependent X-ray diffraction（XRD）, scanning electron microscopy（SEM）, differential scanning calorimetry（DSC） and magnetic measurements. The La0.1Bi0.9FeO3 compounds crystallized in a rhombohedrally distorted perovskite structure with space group R3 c. The substitution of La for Bi reduced the rhombohedral distortion. The structural phase transitions in La0.1Bi0.9FeO3 driven by temperature showed that the extraordinary two-phase coexistence state of BiF eO 3 and LaF eO 3 was observed in a narrow temperature range of 630–700 oC. The magnetization of the La0.1Bi0.9FeO3 sample was improved by heat treatment in the temperature range. When the heat treatment temperatures rose from 25 to 600 oC, the remanence（Mr） and coercivity（Hc） of the La0.1Bi0.9FeO3 compound almost remained the same, and increased rapidly to 0.134 emu/g and 7.1 KOe on further increasing the heat treatment temperature to 650 oC.
姚青荣1,2,3，沈逸豪2，周怀营1,2，饶光辉2，邓健秋2，潘顺康2
1. School of Materials Science and Engineering,Central South University2. School of Materials Science and Engineering,Guilin University of Electronic Technology3. Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology
摘 要：The nano-crystalline La0.1Bi0.9FeO3 compound was successfully synthesized by starch-based combustion method. The crystal structure and magnetic behavior were studied by temperature-dependent X-ray diffraction（XRD）, scanning electron microscopy（SEM）, differential scanning calorimetry（DSC） and magnetic measurements. The La0.1Bi0.9FeO3 compounds crystallized in a rhombohedrally distorted perovskite structure with space group R3 c. The substitution of La for Bi reduced the rhombohedral distortion. The structural phase transitions in La0.1Bi0.9FeO3 driven by temperature showed that the extraordinary two-phase coexistence state of BiF eO 3 and LaF eO 3 was observed in a narrow temperature range of 630–700 oC. The magnetization of the La0.1Bi0.9FeO3 sample was improved by heat treatment in the temperature range. When the heat treatment temperatures rose from 25 to 600 oC, the remanence（Mr） and coercivity（Hc） of the La0.1Bi0.9FeO3 compound almost remained the same, and increased rapidly to 0.134 emu/g and 7.1 KOe on further increasing the heat treatment temperature to 650 oC.
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