Abstract
In this work, Bi1−x Er x FeO3 (x = 0.05–0.25) nanoparticles were prepared by sol–gel method. X-ray diffraction and Raman analysis show that the structure of Er-doped BiFeO3 changes from rhombohedral lattice to orthorhombic one by increasing x. The remnant magnetization of the Bi1−x Er x FeO3 is significantly higher than those in BiFeO3 doped with non-magnetically rare-earth and it increases with increasing Er concentration. The enhanced magnetization was attributed to the suppression of the cycloidal spin structure by Er3+ substitution and the ferromagnetic interaction between Fe3+ and Er3+ ions. The variation of the magnetization with temperature is also discussed.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. 11147101), the Natural Science Foundation of Henan (Grant Nos. 102102210448, 102102210452), and the Natural Science Foundation of Henan Department of Education (Grant No. 13A140806). The authors are grateful to Dr. Jiecai Fu of Lanzhou University for help with the TEM measurements. Dr. Zhao thanks Dr. Xingmin Cai and Dr. Fan Ye of School of Physical Science and Technology of Shenzhen University for helpful discussion.
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Zhao, J., Liu, S., Zhang, W. et al. Structural and magnetic properties of Er-doped BiFeO3 nanoparticles. J Nanopart Res 15, 1969 (2013). https://doi.org/10.1007/s11051-013-1969-7
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DOI: https://doi.org/10.1007/s11051-013-1969-7