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. Author manuscript; available in PMC: 2021 Feb 22.
Published in final edited form as: Mater Sci Energy Technol. 2019;2(2):150–160. doi: 10.1016/j.mset.2019.01.009

Fig. 9.

Fig. 9.

Hysteresis at 5 K of the prepared catalysts. The different catalyst shown are (a) MnFe2O4 10PVA, (b) MnFe2O4 15PVA, (c) MnFe2O4 20PVA, (d) Mn0.5Fe2.5O4 15PVA, and (e) Mn2.5Fe0.5O4 15PVA. The Mn2.5Fe0.5O4 15PVA particles contain one type of nanoparticles with blocking temperature at about 200 K. This is clearly visible from the peak at about 200 K on temperature-dependent AC susceptibility and around maximum on ZFC curve. The sample shows a hysteresis at 5 K with coercive field 400 Oe.