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Crystal structure and magnetism of BiFeO3 nanoparticles regulated by rare-earth Tb substitution

  • QiaoXia Xing
  • Zhonglin Han
  • Shifeng ZhaoEmail author
Article

Abstract

Tb-doped BiFeO3 nanoparticles were prepared using sol–gel method. The effect of Tb substitution on crystal structure and magnetism of BiFeO3 nanoparticles were investigated. It is shown that the crystal structure and magnetism of BiFeO3 nanoparticles are regulated by rare-earth Tb substitution. Particularly, the sizes of the particles are reduced to smaller than 100 nm after doping with Tb. The magnetization of Tb-doped BiFeO3 nanoparticles has been enhanced in magnitude, which is mainly attributed to the suppression of spin cycloid structure belonging to R3c phase fraction in the process of rhombohedral-to-orthorhombic structural phase transformations. At the meantime, the magnetic hysteresis loops show exchange bias towards negative axis. The exchange bias behaviors originate from the coupling interaction between antiferromagnetic core and ferromagnetic surface. The present work provides a route regulating the magnetization of BiFeO3 particles as well as further promoting its applications in multiferroic materials.

Keywords

BiFeO3 Rietveld Refinement Physical Property Measurement System Pure BiFeO3 BiFeO3 Nanoparticles 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 11264026, 11564028), and Inner Mongolia Science Foundation for Distinguished Young Scholars (Grant No. 2014JQ01).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.School of Physical Science and Technology, Inner Mongolia Key Lab of Nanoscience and NanotechnologyInner Mongolia UniversityHohhotChina

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