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Nanocrystalline BiFeO 3 and rare earth ion doped BiFeO 3 (Bi 0.9 R 0.1 FeO 3 , R=Er and Tm) were prepared by sol–gel method. Rietveld analysis of the X-ray diffractograms of the samples revealed that small amount of impurity phase of Bi 2 Fe 4 O 9 was formed together with the desired phase. In the thermal variation of magnetic mass susceptibility...
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