Study of the heating characteristics and mechanisms of magnetic nanoparticles over a wide range of frequencies and amplitudes of an alternating magnetic field

8th International Conference on Fine Particle Magnetism

Seki, A.^1 ; Kita, E.^1 ; Isaka, D.^1 ; Kikuchi, Y.^1 ; Suzuki, K.Z.^1 ; Horiuchi, A.^1 ; Kishimoto, M.^1 ; Yanagihara, H.^1 ; Oda, T.^2 ; Ohkohchi, N.^2 ; Ikehata, H.^3 ; Nagano, I.^3

Institute of Applied Physics, University of Tsukuba, Ibaraki 305-8573, Tsukuba, Japan^1

Department of Surgery, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba 305-8575, Japan^2

Department of Natural Sci. and Tech., Kanazawa University, Kanazawa 920-1192, Japan^3

关键词: Alternating magnetic field;    Characteristics and mechanisms;    Effective approaches;    Fe3O4 nanoparticles;    Magnetic field amplitudes;    Magnetic hyperthermia;    Magnetic nano-particles;    Wide frequency range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/521/1/012014/pdf
DOI  :  10.1088/1742-6596/521/1/012014

来源: IOP

【 摘 要 】

An effective approach to gaining an understanding of the mechanism of heat generation for magnetic hyperthermia from nanomagnet suspensions is to perform heating tests over a wide frequency range. We constructed a heating test apparatus by using ferrite field cores with air gaps for low frequencies and solenoids for high frequencies. Magnetic field amplitudes up to 600 Oe (400 Oe) can be generated for frequencies lower than 500 kHz (800 kHz). Heat generation tests were performed for ferromagnetic nano-platelets and Co-doped Fe3O4 nanoparticles over a wide range of frequencies.