Nonlinear behavior of magnetic fluid in brownian relaxation: Numerical simulation and derivation of empirical model

Takashi Yoshida, Keiji Enpuku

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Nonlinear Brownian relaxation of magnetic fluids for the case of large excitation field was studied in relation to its biomedical applications. The Fokker-Planck equation, which describes the nonlinear behavior of magnetic fluids, was solved by numerical simulation when ac field was applied. Frequency-dependences of the harmonics were investigated in terms of the effective Brownian relaxation time τeff, which was empirically obtained from the ac susceptibility of the fundamental component. It was shown that higher harmonics become small even at ωτeff=1 compared to each quasi-static harmonics amplitudes.

Original languageEnglish
Title of host publicationMagnetic Particle Imaging - A Novel SPIO Nanoparticle Imaging Technique
EditorsJorn Borgert, Thorsten M. Buzug
PublisherSpringer Science and Business Media, LLC
Pages9-13
Number of pages5
ISBN (Print)9783642241321
DOIs
Publication statusPublished - Jan 1 2012
Event2nd International Workshop on Magnetic Particle Imaging, IWMPI 2012 - Lubeck, Germany
Duration: Mar 15 2012Mar 16 2012

Publication series

NameSpringer Proceedings in Physics
Volume140
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Other

Other2nd International Workshop on Magnetic Particle Imaging, IWMPI 2012
CountryGermany
CityLubeck
Period3/15/123/16/12

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Yoshida, T., & Enpuku, K. (2012). Nonlinear behavior of magnetic fluid in brownian relaxation: Numerical simulation and derivation of empirical model. In J. Borgert, & T. M. Buzug (Eds.), Magnetic Particle Imaging - A Novel SPIO Nanoparticle Imaging Technique (pp. 9-13). (Springer Proceedings in Physics; Vol. 140). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-642-24133-8_2