高压物理学报2011，Vol.25Issue(2)：143-146,4.
A位平均离子尺寸对六方RMnO3多铁化合物的结构和性能调控
Structure and Properties Modulation of RMnO3 Multiferroic Materials by Average Ionic Radius at A-Site
摘要
Abstract
The effects of internal chemical pressure produced by A-site ionic radius were investigated for the Ho1-xDyx MnO3 system. It is found that the hexagonal HoMnO3 is gradually transformed to orthorhombic perovskite structure as reducing A-site ion size, forming three regions which contain pure hexagonal phase,mixture of hexagonal and orthorhombic phases and pure orthorhombic phase respectively. Using Rietveld method, the crystal structures were refined,and moreover, the correlations between lattice parameters and unit cell volume as a function of Dy3+ ion content x were obtained. The properties of the temperature dependence of the magnetization and specific heat were also studied. It is suggested that Dy3+-doping would increase the ordering temperature T2 of rare earth elements.关键词
RMnO3/结构相变/多铁性化合物Key words
RMnO3/ phase transitions/ multiferroic compounds分类
数理科学引用本文复制引用
冯少敏,王丽娟,朱金龙,刘清青,李凤英,靳常青..A位平均离子尺寸对六方RMnO3多铁化合物的结构和性能调控[J].高压物理学报,2011,25(2):143-146,4.基金项目
国家重点基础研究发展计划(973计划)(2009CB623301) （973计划）
