Low-frequency complex magnetic susceptibility of magnetic composite microspheres in colloidal dispersion

Ben H. Erné; Maria Claesson; Stefano Sacanna; Mark Klokkenburg; Emile Bakelaar; Bonny W.M. Kuipers

doi:10.1016/j.jmmm.2006.11.169

Low-frequency complex magnetic susceptibility of magnetic composite microspheres in colloidal dispersion

Ben H. Erné, Maria Claesson, Stefano Sacanna, Mark Klokkenburg, Emile Bakelaar, Bonny W.M. Kuipers

Chemistry

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

Abstract

A procedure is presented to determine the permanent magnetic dipole moment of composite microspheres containing magnetic nanoparticles with a blocked magnetic dipole moment. The composite particles are dispersed in a solvent, and the complex magnetic susceptibility is measured from 0.1 to 1000 Hz using a highly sensitive new setup. Composite particles with a permanent magnetic dipole moment are revealed by a characteristic frequency that corresponds to the Brownian rotation of the microspheres. From measured susceptibility spectra, we calculate the permanent magnetic dipole moment of recently developed cobalt ferrite-doped silica and latex microspheres.

Original language	English (US)
Pages (from-to)	145-149
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	311
Issue number	1 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jmmm.2006.11.169
State	Published - Apr 2007

Keywords

Brownian relaxation
Cobalt ferrite
Colloidal dispersion
Complex magnetic susceptibility
Latex
Magnetic dipole moment
Magnetic nanoparticle
Magnetic susceptibility
Microsphere
Silica

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2006.11.169

Cite this

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title = "Low-frequency complex magnetic susceptibility of magnetic composite microspheres in colloidal dispersion",

abstract = "A procedure is presented to determine the permanent magnetic dipole moment of composite microspheres containing magnetic nanoparticles with a blocked magnetic dipole moment. The composite particles are dispersed in a solvent, and the complex magnetic susceptibility is measured from 0.1 to 1000 Hz using a highly sensitive new setup. Composite particles with a permanent magnetic dipole moment are revealed by a characteristic frequency that corresponds to the Brownian rotation of the microspheres. From measured susceptibility spectra, we calculate the permanent magnetic dipole moment of recently developed cobalt ferrite-doped silica and latex microspheres.",

keywords = "Brownian relaxation, Cobalt ferrite, Colloidal dispersion, Complex magnetic susceptibility, Latex, Magnetic dipole moment, Magnetic nanoparticle, Magnetic susceptibility, Microsphere, Silica",

author = "Ern{\'e}, {Ben H.} and Maria Claesson and Stefano Sacanna and Mark Klokkenburg and Emile Bakelaar and Kuipers, {Bonny W.M.}",

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volume = "311",

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TY - JOUR

T1 - Low-frequency complex magnetic susceptibility of magnetic composite microspheres in colloidal dispersion

AU - Erné, Ben H.

AU - Claesson, Maria

AU - Sacanna, Stefano

AU - Klokkenburg, Mark

AU - Bakelaar, Emile

AU - Kuipers, Bonny W.M.

PY - 2007/4

Y1 - 2007/4

N2 - A procedure is presented to determine the permanent magnetic dipole moment of composite microspheres containing magnetic nanoparticles with a blocked magnetic dipole moment. The composite particles are dispersed in a solvent, and the complex magnetic susceptibility is measured from 0.1 to 1000 Hz using a highly sensitive new setup. Composite particles with a permanent magnetic dipole moment are revealed by a characteristic frequency that corresponds to the Brownian rotation of the microspheres. From measured susceptibility spectra, we calculate the permanent magnetic dipole moment of recently developed cobalt ferrite-doped silica and latex microspheres.

AB - A procedure is presented to determine the permanent magnetic dipole moment of composite microspheres containing magnetic nanoparticles with a blocked magnetic dipole moment. The composite particles are dispersed in a solvent, and the complex magnetic susceptibility is measured from 0.1 to 1000 Hz using a highly sensitive new setup. Composite particles with a permanent magnetic dipole moment are revealed by a characteristic frequency that corresponds to the Brownian rotation of the microspheres. From measured susceptibility spectra, we calculate the permanent magnetic dipole moment of recently developed cobalt ferrite-doped silica and latex microspheres.

KW - Brownian relaxation

KW - Cobalt ferrite

KW - Colloidal dispersion

KW - Complex magnetic susceptibility

KW - Latex

KW - Magnetic dipole moment

KW - Magnetic nanoparticle

KW - Magnetic susceptibility

KW - Microsphere

KW - Silica

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U2 - 10.1016/j.jmmm.2006.11.169

DO - 10.1016/j.jmmm.2006.11.169

M3 - Article

AN - SCOPUS:33947108366

SN - 0304-8853

VL - 311

SP - 145

EP - 149

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1 SPEC. ISS.

ER -

Low-frequency complex magnetic susceptibility of magnetic composite microspheres in colloidal dispersion

Abstract

Keywords

ASJC Scopus subject areas

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