Nonlinear behavior of magnetic fluid in Brownian relaxation

Takashi Yoshida, Koutaro Ogawa, Anwarul K. Bhuiya, Keiji Enpuku

研究成果: 著書/レポートタイプへの貢献会議での発言

3 引用 (Scopus)

抜粋

This study investigated the nonlinear behavior of magnetic fluids under high excitation fields due to nonlinear Brownian relaxation. As a direct indication of nonlinear behavior, we characterized the higher harmonics of the magnetization signal generated by the magnetic fluid. The amplitudes of the fundamental to the ninth harmonic of the magnetization signal were measured as a function of the external field. The experimental results were compared with numerical simulations based on the Fokker-Planck equation, which describes nonlinear Brownian relaxation. To allow a quantitative comparison, we estimated the size distribution and size dependence of the magnetic moment in the sample. In the present magnetic fluid, composed of agglomerates of Fe3O 4 particles, the magnetic moment was estimated to be roughly proportional to the diameter of the particles, in contrast to the case of single-domain particles. When the size distribution and the size dependence of the magnetic moment were taken into account, there was good quantitative agreement between the experiment and simulation.

元の言語英語
ホスト出版物のタイトル8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers
ページ102-110
ページ数9
1311
DOI
出版物ステータス出版済み - 12 1 2010
イベント8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers - Rostock, ドイツ
継続期間: 5 25 20105 29 2010

その他

その他8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers
ドイツ
Rostock
期間5/25/105/29/10

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Yoshida, T., Ogawa, K., Bhuiya, A. K., & Enpuku, K. (2010). Nonlinear behavior of magnetic fluid in Brownian relaxation. : 8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers (巻 1311, pp. 102-110) https://doi.org/10.1063/1.3529998