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Temperature dependence of magnetization in the zero-field-cooling (ZFC) and field-cooling (FC) regime at a magnetic field of 100 Oe, and remnant magnetization measurements (RM) of the prepared catalyst. The different catalysts shown are (a) MnFe2O4 10PVA, (b) MnFe2O4 15PVA, (c) MnFe2O4 20PVA, (d) Mn0.5Fe2.5O4 15PVA, and (e) Mn2.5Fe0.5O4 15PVA.
