Enhanced electromagnon excitations in Nd-doped BiFeO3 nanoparticles near morphotropic phase boundaries

被引：11
|
作者：
Zhang, Yuan [1 ]
Zhang, Yi [1 ]
Guo, Quan [2 ]
Zhang, Dongwen [2 ]
Zheng, Shuaizhi [1 ]
Feng, Ming [3 ]
Zhong, Xiangli [1 ]
Tan, Congbing [1 ]
Lu, Zhihui [2 ]
Wang, Jinbin [1 ]
Hou, Pengfei [1 ]
Zhou, Yichun [1 ]
Yuan, Jianmin [2 ]
机构：
[1] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China
[2] Natl Univ Def Technol, Coll Sci, Dept Phys, Changsha 410073, Hunan, Peoples R China
[3] Jilin Normal Univ, Minist Educ, Key Lab Funct Mat Phys & Chem, Changchun 130103, Jilin, Peoples R China
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2019年 / 21卷 / 38期
基金：
中国国家自然科学基金;
关键词：
TRANSITIONS; CERAMICS; DRIVEN;
D O I：
10.1039/c9cp04194j
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In multiferroics, electromagnons have been recognized as a noticeable topic due to their indispensable role in magnetoelectric, magnetodielectric, and magnetocapacitance effects. Here, the electromagnons of Bi1-xNdxFeO3 (x = 0-0.2) nanoparticles are studied via terahertz time-domain spectroscopy, and the impacts of doping concentrations on electromagnons have been discussed. We found that the electromagnons in Bi1-xNdxFeO3 nanoparticles are associated with their phase transition. The total coupling weight of electromagnons is gradually increased in polar R3c structures and then reduces in the antipolar Pbam phase, and the weight in the antipolar phase is less than that of the pure R3c phase. Interestingly, a colossal electromagnon is observed at polar-antipolar and antiferromagnetic-ferromagnetic phase boundaries. Our work offers an avenue for designing and choosing materials with better magnetodielectric and magnetocapacitance properties.
引用
收藏
页码：21381 / 21388
页数：8
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