STUDY OF MAGNETIC PROPERTIES OF Co0,4Zn0,6Fe2O4 NANOPARTICLES FOR ADVANCED MAGNETIC HYPERTHEMIA

Abstract

Magnetic properties of ferrites nanostructural with A^IIFe₂O₄ formula (A^II is 2⁺ ion) can control the subtle for different applications. However, the effect of elements at the position of A^II, size, shape and shell on magnetic properties is difficult to predict. This paper focuses on the magnetic properties and heating ability of Co_0,4Zn_0,6Fe₂O₄ nanoparticles (CoFe_Zn0,6) were fabricated by hydrothermal method and coated with chitosan (CoFe_Zn0,6/CS). X-ray diffraction patterns (XRD) and field emission scanning electron microscopy (FESEM) show a spinel structure for both the samples with an average particle size of about 15 nm and a fairly thin CS layer thickness. The saturation magnetization (M_s) at room temperature of CoFe_Zn0,6/CS is 50 emu/g and heating ability of magnetic fluid on this sample was investigated. The highest specific absorption rate value of about 280 W/g received on samples with a concentration of 1 mg/ml under magnetic of 250 Oe and frequency 290 kHz. This result shows that the magnetic fluid has an potential application for magnetic hyperthemia.