Exchange-coupling Interaction and Magnetic Properties of BaFe₁₂O₁₉/Ni_0.5Zn_0.5Fe₂O₄Nanocomposite Ferrite

Abstract

Nano-sized Ba-ferrite, Ni-Zn ferrite and BaFe nanocomposite ferrite were prepared by sol-gel combustion method. Nanocomposite was calcined at temperature range of 600~900 o C for 1 h. According to the diffraction patterns, hard/soft nanocomposite was indicated to the coexistence of the magnetoplumbite structural BaFe and agree with the standard data (JCPDS 10-0325). The particle size of nanocomposite turn out to be less than 90 nm. The nanocomposite ferrite shows a single-phase magnetization behavior, implying that the hard magnetic phase and soft magnetic phase were well exchangecoupled. The specific saturation magnetization (M