High-frequency magnetic properties of Ni-Zn ferrite nanoparticles synthesized by a low temperature chemical method

Spinel-structured Ni-Zn ferrite nanoparticles (NPs) have been directly synthesized by a low temperature co-precipitation method. The structure and high-frequency magnetic properties of the particles were investigated. The as-prepared Ni-Zn ferrite NPs demonstrate typical soft magnetic properties. The saturation magnetization ( M s), as high as about 60 emu/g, was achieved. The imaginary part μ ' ' of the permeability shows a broad peak in the frequency range 200 MHz~6 GHz, which indicates that the as-prepared Ni-Zn ferrite NPs have a remarkable feature of electromagnetic (EM) wave absorption in the high-frequency range. Hence, resultant Ni-Zn ferrite NPs can be used as efficient microwave absorbers and effective heating mediators for hyperthermia application in cancer therapy. Highly crystalline Ni-Zn ferrite NPs, which were synthesized by a room temperature co-precipitation method, demonstrate a broad peak of μ ' ' in high frequency range. The NPs have the potential be to be used as microwave absorbers and effective heating mediators for hyperthermia application in cancer therapy. [Display omitted]