Antiferromagnetic-ferromagnetic transition in Bi-doped LaFeO3 nanocrystalline ceramics
Antiferromagnetic-ferromagnetic transition in Bi-doped LaFeO3 nanocrystalline ceramics
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Bi掺杂LaFeO3纳米晶陶瓷中的反铁磁-铁磁转变
DOI：
10.1016/j.ceramint.2020.05.146
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发表时间：
2020-08
影响因子：
5.2
通讯作者：
Rao Guanghui
中科院分区：
文献类型：
--
作者：
Yao Qingrong;Tian Chuang;Lu Zhao;Wang Jiang;Zhou Huaiying;Rao Guanghui
采用溶胶-凝胶法制备了一系列纳米晶La 1-xBixFeO 3（0.0≤x≤ 0.5）陶瓷粉末。利用X射线衍射和透射电子显微镜研究了样品的晶体结构演变和超精细相互作用。粉末的平均直径显示为约80 nm。所有的样品都结晶成正交晶体结构（空间群Pnma），没有第二相。Bi掺杂样品的磁化强度随着Bi含量的增加而明显提高。当x ≥ 0.2时，出现明显的反铁磁/铁磁相变，当x = 0.5时，获得了23.05kÖe的高矫顽场。磁化强度参数与成键特性之间的高度相关性表明，Fe 3 +-Od 2-键的显著伸缩和Fe 3 +-Od 2--Fe 3+键角的减小是Bi掺杂体系强铁磁性的主要来源。
A series of nanocrystalline La1-xBixFeO3(0.0≤x≤ 0.5) ceramic powders were successfully prepared by the sol-gel method. X-ray diffraction and transmission electron microscopy were used to investigate the crystal structure evolution and hyperfine interactions of the samples. The average diameter of the powders was revealed to be approximately 80 nm. All the samples were crystallized into an orthorhombic crystal structure (space groupPnma) with no second phase. The magnetization of the Bi-doped samples obviously improved with increasing Bi content. A remarkable antiferromagnetic/ferromagnetic transition was detected atx≥ 0.2, and a high coercive field of 23.05 kÖe was obtained withx= 0.5. The high correlation between the magnetization parameters and bonding characteristics indicated that significant stretching of the Fe3+-Od2-bonds and a decrease in Fe3+-Od2--Fe3+linkage angles were the main origins of the strong ferromagnetism in the Bi-doped systems.
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影响因子：
5.4
作者：
H. Falcón;A. Goeta;G. Punte;R. Carbonio
通讯作者：
H. Falcón;A. Goeta;G. Punte;R. Carbonio
影响因子：
4.6
作者：
Javed R. Sheikh;S. Acharya;U. Deshpande
通讯作者：
Javed R. Sheikh;S. Acharya;U. Deshpande
影响因子：
1.9
作者：
L. M. Salah;Medhat A. Haroun;M. Rashad
通讯作者：
L. M. Salah;Medhat A. Haroun;M. Rashad
影响因子：
8.6
作者：
Kodama, RH;Makhlouf, SA;Berkowitz, AE
通讯作者：
Berkowitz, AE
影响因子：
4.4
作者：
GILLEO, MA
通讯作者：
GILLEO, MA