Synthesis and characterization of Mg1+xFe2-2xTixO4 nanoparticles with an adjustable Curie point

Mg1+xFe2-2xTixO4 ferrite nanoparticles for Self-Regulating Magnetic-Fluid Hyperthermia were synthesized by the co-precipitation of Fe3+, Mg2+ and Ti4+ ions using NaOH, The hydroxide precursors were heated to 1000 degrees C in air and the product, (Mg.Ti)-ferrite, was milled in the presence of a surfactant in a high-energy mill, resulting in the magnetic fluid. The magnetic particles were characterized with transmission electron microscopy. X-ray diffractiometry and magnetic measurements. The Mg1+xFe2-2xTixO4 nanoparticles with x=0.37 exhibited a room-temperature magnetization of 8 emu/g at 1 land a Curie temperature (T-c) of 46 degrees C. The heating ability of the nanoparticles in an AC magnetic field was measured using a calorimeter. (C) 2013 Elsevier B.V. All rights reserved.