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(a) Powder XRD pattern of the STO and Mn-STO samples. (b) Magnified view of the 110 plane showing a peak shift in Mn-STO. (c) Comparison of Raman spectra of STO and Mn-STO. (d) UV–visible spectra of STO and Mn-STO and (e) corresponding Tauc's plot to find the band gap. (f) EPR spectra of STO and Mn-STO.
