【摘 要】
：
As one of most outstanding multiferroic material, BiFeO3 has attracted enormous curiosities because of its high ferroelectric Curie temperature and G-type antiferromagnetic order below Néel temperatur
【机 构】
：
School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnolog
【出 处】
：
2016’中国溶胶-凝胶学术研讨会暨国际论坛
论文部分内容阅读
As one of most outstanding multiferroic material, BiFeO3 has attracted enormous curiosities because of its high ferroelectric Curie temperature and G-type antiferromagnetic order below Néel temperature [1], which makes it favorable to exhibit magnetoelectric coupling at and above room temperature.However, the G-type antiferromagnetic order and this spin structure which modified by a spin cycloid with periodicity of 62 nm along axis cancel the net macroscopic magnetization and inhibit linear magnetoelectric effect [2].Hence, suppressing the spiral spin structure becomes an important route to enhance the magnetic properties.Therefore, it is properly that substituting Bi with Tb to study how the doped cations affect the structure and magnetization of BiFeO3 particles.Bi1-xTbxFeO3 (x =0, 0.5, 0.1, 0.15 and 0.2) polycrystalline nanoparticles were prepared by Sol-gel method.Following two distinct facts motivate the progress of present work: (a) both lattice constants and interplanar distance reduced with increasing Tb concentration, (b) the magnetic hysteresis (M-H) loops show the exchange bias towards negative axis.The origins of the effect of doping concentration on the structure and magnetization are discussed in detail.
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