回転磁界を用いた磁性微粒子の分散に関する基礎検討

概要

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Magnetic particles that are used in the human body need to be dispersed to prevent from blocking the blood flow. In this paper, we propose a new method for the dispersion by using magnetic particles with magnetic anisotropy and applying a rotational magnetic field. To estimate a suitable size for the particles and a rotational frequency to disperse of the particles, theoretical formulas were obtained according to a condition where the state of two magnets changed from aggregated to isolated. We confirmed the condition for the aggregated two magnets to become isolated experimentally by changing the thickness of the coating of the magnet and the frequency of the applied rotational magnetic field. The experimental and theoretical results agreed well. This confirmed that the proposed method could be used to disperse magnetic particles. The size of particles and the rotational frequency for isolation were estimated from these formulas.
社団法人　日本磁気学会の論文
2009-05-01