Preparation of Mn ferrite nanoparticles via ultrasonic assisted Co-precipitation method for hyperthermia

Abstract

In this work, Mn ferrite nanopowders were prepared by ultrasonic assisted co-precipitation method and were characterized. Phase identification of the nanopowders was performed by X-ray diffraction method and the mean crystallite size of the nanopowders was calculated by Scherrer's formula with necessary corrections. Magnetic parameters of the prepared nanopowders were measured by a vibrating sample magnetometer. A sensitive thermometer was used to measure the increase in temperature due to application of an alternating magnetic field on suspended magnetic nanopowders in water. Transmission electron microscope investigations showed that the particle size distribution was homogeneous and their mean particle size was in a good agreement with those obtained by Scherrer's formula. The results show that a single phase Mn ferrite can be obtained by ultrasonic assisted co-precipitation method at 70 °C with a mean particle size of 5 nm and a 5 °C increase was achievable in an AC magnetic field. © 2011 Springer-Verlag Berlin Heidelberg.