物理学报2012，Vol.61Issue(5)：433-438,6.
多铁性BiFeO_3纳米颗粒的尺寸依赖磁性能研究
Study on the size-dependent magnetic properties of multiferroic BiFeO3 nanoparticles
摘要
Abstract
The pure phase BiFeO3 nanoparticles with different sizes are prepared by an ethylenediaminetetraacetic acid complexing sol-gel process. The structure, the morphology and the magnetic properties of BiFeO3 nanoparticles are characterized by X-ray diffractometry, scanning electron microscopy, superconducting quantum interference device magnetometer and Mossbaner spectra analysis. The results show that the BiFeO3 nanoparticle possesses an weak ferromagnetism at room temperature with a strongly size-dependent property. It reflects that the weak ferromagnetism present in the BiFeO3 nanoparticle should be attributed to the grain size-confinement effect, rather than the existence of the magnetic impurity or Fe2＋.关键词
BiFeO_3/纳米颗粒/磁性能/尺寸限制效应Key words
BiFeO3/nanoparticles/magnetic properties/size-confinement effects分类
信息技术与安全科学引用本文复制引用
魏杰,陈彦均,徐卓..多铁性BiFeO_3纳米颗粒的尺寸依赖磁性能研究[J].物理学报,2012,61(5):433-438,6.基金项目
中央高校基本科研业务费专项资金（批准号：xjj20100148,2011jdhz10）和西安交通大学新教师支持计划和陕西省自然科学基础研究计划（批准号：2011JM6001）资助的课题. （）
