Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids

Masaaki Motozawa; Tatsuo Sawada

doi:10.1016/j.jmmm.2004.11.019

Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids

Masaaki Motozawa, Tatsuo Sawada

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Experimental results for anisotropy and hysteresis of ultrasonic propagation velocity in a kerosene-based magnetic fluid are reported. The ultrasonic frequencies used are 1, 2 and 4 MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550 mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity increases with magnetic field intensity and ultrasonic frequency. Anisotropy due to the configuration of chain-like clusters is also observed. These results seem to be caused by cluster formation and the characteristic time of Brownian motion of the magnetic particles.

Original language	English
Pages (from-to)	66-69
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	289
DOIs	https://doi.org/10.1016/j.jmmm.2004.11.019
Publication status	Published - 2005 Mar

Keywords

Anisotropy
Cluster
Magnetic fluid
Sound velocity
Ultrasonic wave

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2004.11.019

Cite this

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title = "Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids",

abstract = "Experimental results for anisotropy and hysteresis of ultrasonic propagation velocity in a kerosene-based magnetic fluid are reported. The ultrasonic frequencies used are 1, 2 and 4 MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550 mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity increases with magnetic field intensity and ultrasonic frequency. Anisotropy due to the configuration of chain-like clusters is also observed. These results seem to be caused by cluster formation and the characteristic time of Brownian motion of the magnetic particles.",

keywords = "Anisotropy, Cluster, Magnetic fluid, Sound velocity, Ultrasonic wave",

author = "Masaaki Motozawa and Tatsuo Sawada",

note = "Funding Information: We would like to thank Mr. Y. Matsumoto of Keio University and Mr. K. Kobayashi of Honda Electronics Co., Ltd. for their collaboration in experiments. This work has been partially supported by a Grant-in-Aid for Scientific Research (C) of the Japan Society for Promotion of Science. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2005",

month = mar,

doi = "10.1016/j.jmmm.2004.11.019",

language = "English",

volume = "289",

pages = "66--69",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

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T1 - Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids

AU - Motozawa, Masaaki

AU - Sawada, Tatsuo

N1 - Funding Information: We would like to thank Mr. Y. Matsumoto of Keio University and Mr. K. Kobayashi of Honda Electronics Co., Ltd. for their collaboration in experiments. This work has been partially supported by a Grant-in-Aid for Scientific Research (C) of the Japan Society for Promotion of Science. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2005/3

Y1 - 2005/3

N2 - Experimental results for anisotropy and hysteresis of ultrasonic propagation velocity in a kerosene-based magnetic fluid are reported. The ultrasonic frequencies used are 1, 2 and 4 MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550 mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity increases with magnetic field intensity and ultrasonic frequency. Anisotropy due to the configuration of chain-like clusters is also observed. These results seem to be caused by cluster formation and the characteristic time of Brownian motion of the magnetic particles.

AB - Experimental results for anisotropy and hysteresis of ultrasonic propagation velocity in a kerosene-based magnetic fluid are reported. The ultrasonic frequencies used are 1, 2 and 4 MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550 mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity increases with magnetic field intensity and ultrasonic frequency. Anisotropy due to the configuration of chain-like clusters is also observed. These results seem to be caused by cluster formation and the characteristic time of Brownian motion of the magnetic particles.

KW - Anisotropy

KW - Cluster

KW - Magnetic fluid

KW - Sound velocity

KW - Ultrasonic wave

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DO - 10.1016/j.jmmm.2004.11.019

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AN - SCOPUS:14844337565

SN - 0304-8853

VL - 289

SP - 66

EP - 69

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Influence of magnetic field on ultrasonic propagation velocity in magnetic fluids

Abstract

Keywords

ASJC Scopus subject areas

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