常州大学学报（自然科学版）2016，Vol.28Issue(4)：48-53,6.DOI:10.3969/j.issn.2095-0411.2016.04.009
BiFeO3纳米颗粒的磁性和铁电性研究
Magnetic and Ferroelectric Properties of BiFeO3 Nanoparticles
摘要
Abstract
Based on the renormalization of Dzyaloshinskii-Moriya interaction (DMI),the multiferroic prop-erties of BiFeO3 (BFO)nanoparticles were investigated by using Green�s function technique.It was found that the magnetization (polarization)decreased and vanished continuously at the magnetic transition tem-perature TN(ferroelectric transition temperature TC)as the temperature increased.It was found that the phase-transition temperature TN(TC)shifted to higher values as the exchange coupling constants Jb and Js(Bb and Bs)increased.It was also found that the magnetization and the polarization were both enhanced as the magnetoelectric coupling constant (g)increased.For this reason,the magnetic and the ferroelectric phase coexisted in this region.In addition,it was observed that there existed a cusp around 40K,which were unique to the nanosize effect of BFO.关键词
BiFeO3 纳米颗粒/DM相互作用/相变Key words
BiFeO3 nanoparticle/Dzyaloshinskii-Moriya interaction/phase-transition分类
数理科学引用本文复制引用
曹先胜,吉高峰,罗炳成..BiFeO3纳米颗粒的磁性和铁电性研究[J].常州大学学报（自然科学版）,2016,28(4):48-53,6.基金项目
国家自然科学基金资助项目(60171034)。 （60171034）
