Abstract
Mn- and Co-doped and pure BiFeO3 (BFO) nanoparticles were synthesized through sol-gel method. The result of the Rietveld refinement based on X-ray diffraction (XRD) data revealed that BFO and 10 % Co-doped BFO sample crystallize in rhombohedral symmetry (R3c) structure. The transition of crystal structure can be found when Fe atoms were replaced by Mn atoms partially (from R3c to P4/mbm). Besides, Raman spectra further confirm the structure transformation which is consistent with the results of Rietveld refinements. Analysis of vibrating sample magnetometer (SQUID–VSM) magnetic hysteresis data shows the enhancement of magnetism in Mn- and Co-doped samples which were explained by the changing of bond length and angle which were obtained from the Rietveld refinement.
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Acknowledgments
We acknowledge the financial support from the National Basic Research Program of China (2012CB933301, 2014CB648300), the Key Project of National High Technology Research of China (2011AA050526), the Ministry of Education of China (No. IRT1148), the National Synergistic Innovation Center for Advanced Materials (SICAM), the Natural Science Foundation of Jiangsu Province, China (BM2012010), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, YX03001), Science and Technology Innovation on Training Program (STITP, SZDG2014018), and the National Natural Science Foundation of China(51172110, 51372119, 61377019,61136003, 51173081).
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Ma, Y., Tang, X., Lu, M. et al. Substitution-driven Structural and Magnetic Transformation of Mn- and Co-doped BiFeO3 . J Supercond Nov Magn 28, 3593–3598 (2015). https://doi.org/10.1007/s10948-015-3166-7
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DOI: https://doi.org/10.1007/s10948-015-3166-7