双钙钛矿Sr2FeMoO6的微波合成、表征及电磁性能

稀有金属材料与工程, 2011, 40(5): 906-910.

双钙钛矿Sr2FeMoO6的微波合成、表征及电磁性能

翟永清 ^1, , 张张 ^2, , 霍国燕 ^3, , 任明辉 ^4,

1.河北大学,河北,保定,071002

2.河北大学,河北,保定,071002

3.河北大学,河北,保定,071002

4.河北大学,河北,保定,071002

基金项目: 国家自然科学基金项目(50672020)

关键词：微波法 , 双钙钛矿 , Sr2FeMoO6 , 磁电阻

Microwave Synthesis, Characterization, Magnetic and Electrical Properties of Double Perovskite Sr2FeMoO6

以SrCO3、Fe2O3、MoO3为原料,MnO2为微波吸收剂,采用微波烧结法成功合成双钙钛矿Sr2FeMoO6粉体.XRD结果表明,产品为四方晶系Sr2FeMoO6,空间群为14/mmm,晶胞参数为:a=0.5571nm,c=0.7872nm,利用X射线衍射数据经Scherrer公式计算所得样品的晶粒尺寸为20nm左右.磁性能测试结果表明,样品表现为铁磁性,磁转变温度高于室温,1T磁场下室温饱和磁化强度为17.949(A·m2)/kg.电性能测试结果表明,样品呈现典型的半导体行为,导电机制属于绝热小极化子导电机制,样品在1T磁场下的室温磁电阻变化率可达-15.63%.

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材料期刊网

双钙钛矿Sr2FeMoO6的微波合成、表征及电磁性能

Microwave Synthesis, Characterization, Magnetic and Electrical Properties of Double Perovskite Sr2FeMoO6

参考文献