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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2010-07-22
Strong Magnetic Field Induced Segregation and Self-Assembly of Micrometer Sized Non-Magnetic Particles
By
Zhi Sun,

    Dr. Zhi Sun

    Department of Metallurgy and Materials Engineering

    Katholieke Universiteit Leuven

    Belgium

    Homepage

Muxing Guo,

    Dr. Muxing Guo

    Department of Metallurgy and Materials Engineering

    Katholieke Universiteit Leuven

    Belgium

    Homepage

Jef Vleugels,

    Dr. Jef Vleugels

    Department of Metallurgy and Materials Engin

    Katholieke Universiteit Leuven

    Belgium

    Homepage

Omer Van der Biest,

    Dr. Omer Van der Biest

    Department of Metallurgy and Materials Engineering

    Katholieke Universiteit Leuven

    Belgium

    Homepage

Bart Blanpain

    Dr. Bart Blanpain

    Department of Metallurgy and Materials Engineering

    Katholieke Universiteit Leuven

    Belgium

    Homepage

Progress In Electromagnetics Research B, Vol. 23, 199-214, 2010
doi:10.2528/PIERB10062104 | Google Scholar

Abstract
Micrometer and sub-micrometer sized non-magnetic particles were manipulated by an external strong magnetic field (e.g. 10 Tesla) with a high gradient. During the strong magnetic field effects, segregation of the non-magnetic particles was observed which could not be realised only with gravitational field. Numerical calculations were subsequently carried out to understand the effects on the insulating particles in a conductive liquid matrix. The migration of micrometer sized particles is obviously enhanced by the magnetic field gradient. Combining the experimental results and theoretical analysis, particle-particle magnetic interaction was found to influence the overall segregation of the particles as well. Magnetised by the strong magnetic field, magnetic interaction between non-magnetic particles becomes dominant and a self-assembly behavior can be demonstrated. Various factors such as the magnetic dipole-dipole interaction and chain-chain interaction, are governing the particles assembly. According to calculations, magnetic field should be strong enough, at least 7 T in order to obtain the assembly morphologies in the present case.
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Citation
Zhi Sun, Muxing Guo, Jef Vleugels, Omer Van der Biest, and Bart Blanpain, "Strong Magnetic Field Induced Segregation and Self-Assembly of Micrometer Sized Non-Magnetic Particles," Progress In Electromagnetics Research B, Vol. 23, 199-214, 2010.
doi:10.2528/PIERB10062104
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