Temperature sensitive ferrofluid composed of Mn1 − xZnxFe2O4 nanoparticles prepared by a modified hydrothermal process

► Mn-Zn ferrite spinels as temperature sensitive precursors. ► A novel modified hydrothermal processing enables growth of nano-sized metal particles. ► Mn-Zn ferrite particles with a high saturation magnetization and low Curie point.