Investigation of Structural Changes in Bismuth Substituted SrFe12O19 Compound Using In-Situ Raman Spectroscopy
DOI:
https://doi.org/10.61343/jcm.v2i02.109Keywords:
Strain, Raman spectra, DistortionAbstract
The sol-gel auto-combustion method has been adopted for the preparation of bismuth (Bi) substituted strontium hexaferrite (SrFe12O19) polycrystalline compound. The substitution of bismuth has created significant distortion at various sites, which has been confirmed by the Raman spectra of Sr1-xBixFe12O19 (x = 0, 0.01, and 0.02). The compound SBFO1 (x = 0.01) is the highly strained out of three compounds. Again, the 2b and 12k site of SBFO1 is so much distorted that, the Raman peak associated to 12k site (i.e. 417.7 cm-1) has been split into two peaks at 413.8 cm-1 and 432.9 cm-1. The damping constant and spring constant calculated from the Raman data for validates the XRD data. The highest compressive volumetric strain nature of SBFO1 is well established by the lowest damping constant of SBFO1. The variation of the bond length associated to the different crystallographic sites well matches with the shifting of Raman peaks for that site. The same is again approved by the highest spring constant of SBFO1.
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Copyright (c) 2025 Dr. Manas Ranjan Sahoo, A. Barik, R. Ghosh, S. Mishra, J. Ray, S. Kuila, M. Mandal, P. N. Vishwakarma
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