Ho、Mn共掺对BiFeO_3陶瓷材料的微观形貌和磁电性能的影响  

Effect of Ho and Mn co-doping on morphology and magnetoelectric properties of BiFeO_3 ceramics

作　　者：仲麒[1] 张铭[1] 邓浩亮[1] 魏纪周 侯育冬[1] 朱满康[1] 严辉[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《功能材料》2014年第17期17075-17078,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(11174021);北京市自然科学基金资助项目(2122007)

摘　　要：采用传统的固相烧结法制备了Bi0.9Ho0.1Fe1-xMnxO3(x=0.05,0.10,0.15)陶瓷体系。XRD结果表明,Bi0.9Ho0.1Fe1-xMnxO3陶瓷存在杂相Bi2Fe4O9,随着Mn4+的掺入量的增加,(104)和(110)峰逐渐合并,(006)峰逐渐消失,证明其结构由菱方钙钛矿结构向四方结构发生转变;SEM分析可知,Bi0.9Ho0.1Fe1-x MnxO3陶瓷体系的晶粒随着Mn4+掺入量的增加逐渐变大;铁电性能测试表明,Bi0.9Ho0.1Fe1-xMnxO3(x=0.05,0.10,0.15)陶瓷在室温下具有铁电性,但电滞回线不饱和,说明其存在漏导;剩余极化值随着Mn4+掺入量的增加,先增大后急剧减小;磁性测试表明Bi0.9Ho0.1Fe1-xMnxO3(x=0.05,0.10,0.15)陶瓷表现出了铁磁性,其磁性随着Mn4+掺入量的增加而增强。除此之外,Bi0.9Ho0.1Fe1-xMnxO3(x=0.05,0.10,0.15)陶瓷具有一种特殊的磁滞回线,表明其随着磁场的增大发生了磁诱导相变。Multiferroic ceramics Bi0.9 Ho0.1 Fe1 -x Mnx O 3 （x = 0.05,0.10,0.15 ）ceramics were prepared by solid state reaction method.X-ray diffraction （XRD）indicated that Bi0.9 Ho0.1 Fe1 -x Mnx O 3 ceramics exit secondary phase Bi2 Fe4 O 9 at about 27°.With increasing Mn4＋ content,the gradualmerging of the （104）and （1 10）peaks and the gradual disappearance of the （006）peakindicateda structural transition from the rhombohedral to the tetragonalwere observed.SEM images indicated that the grain size increases with increasing Mn4＋ ions dopant concentration.Ferroelectric performance testing were shown that all samples present the typical lossunsaturated ferroelectric behavior,as the P-E loops were not saturated.The remanent polarization of Bi0.9 Ho0.1 Fe1 -x Mnx O 3 （x =0.05,0.10,0.15）ceramics increased and then decreased sharply.The M-H curves recorded at room temperature revealed that the remanent magnetization increasedwith increasing Mn4＋ content.In other words,the unique M-H loops indicated that the Bi0.9 Ho0.1 Fe1 -x Mnx O 3 ceramics have a metamagnetic transition with increasing magnetic filed.

关 键 词：多铁性材料铁酸铋 Ho、Mn掺杂 磁诱导相变 

分 类 号：TM22[一般工业技术—材料科学与工程]