Effect of particle growth on heat generation mechanism in AC magnetic field for calcined sample of nano-sized Y₃Fe₅O₁₂ ferrite powder prepared by bead milling

Abstract

Nano-sized Y₃Fe₅O₁₂ ferrite powder prepared by bead milling was calcined to clarify the effect of particle growth on the heat generation mechanism in AC magnetic field. The maximum heat generation ability of 0.46W•g^-1 (1.77kA•m^-1,370kHz) was obtained for the sample calcined at 700oC. Although the suparparamagnetic material was obtained for the sample calcined at low temperature, the ferrimagnetic property showed for that calcined at 700^oC (particle size 37nm).