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The phase transformation temperature of γ-Fe2O3 to α-Fe2O3 is increased with Zn2+ doping and enhancement of the transition temperature by ∼100 °C is obtained for doping of ≥15 mol% Zn in nanocrystalline γ-Fe2O3 synthesized by an autocombustion method.
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Deka et al. (2007) studied this question.
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