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The M-H hysteresis loops of the iron-nickel microcrystals at room temperature; (a) 0.1 M metal concentration in 40 mL reaction volume, (b) 0.1 M metal concentration in 80 mL reaction volume, and (c) 0.3 M metal concentration in 80 mL reaction solution. Reaction reference: 1400 rpm and 95–98 °C.
