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

• Published in: Physical chemistry chemical physics : PCCP 2019-10, Vol.21 (38), p.21381-21388
• Main Authors: Zhang, Yuan, Zhang, Yi, Guo, Quan, Zhang, Dongwen, Zheng, Shuaizhi, Feng, Ming, Zhong, Xiangli, Tan, Congbing, Lu, Zhihui, Wang, Jinbin, Hou, Pengfei, Zhou, Yichun, Yuan, Jianmin
• Format: Article
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/c9cp04194j

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 Bi 1− x Nd x FeO 3 ( 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 Bi 1− x Nd x FeO 3 nanoparticles are associated with their phase transition. The total coupling weight of electromagnons is gradually increased in polar R 3 c structures and then reduces in the antipolar Pbam phase, and the weight in the antipolar phase is less than that of the pure R 3 c 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. In multiferroics, electromagnons have been recognized as a noticeable topic due to their indispensable role in magnetoelectric, magnetodielectric, and magnetocapacitance effects.