Influence of Temperature on the Magneto-Dielectrics Effect of Oil-Based Ferrofluid

• Authors: J. Kúdelčík , Š. Hardoň , P. Bury , M. Timko , P. Kopčanský
• Languages of publication: EN

Abstracts

EN

The effect of temperature on the magneto-dielectrics behavior was studied by dielectric spectroscopy in the transformer oil-based ferrofluid with magnetic nanoparticles upon the effect of an external magnetic field. The frequency dependence of complex permittivity and dissipation factor were measured within the frequency range from 1 mHz to 10 kHz at different temperatures by a capacitance method. The dielectrics parameters were measured as a function of the external magnetic field in the range of 0-200 mT, parallel to the direction of the electric field as a function of temperature in the range of 15-35°C. The interaction between magnetic field and magnetic moments of nanoparticles led to the aggregation of magnetic nanoparticles to new structures which had influence on dielectric parameters. The dependence of these parameters at constant magnetic field on angle between the direction of the electric and magnetic fields (anisotropy) has been measured, too.

Keywords

EN

47.65.Cb; 77.22.Gm; 77.22.Ch

Discipline

• 47.65.Cb: Magnetic fluids and ferrofluids
• 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)
• 77.22.Gm: Dielectric loss and relaxation

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 483-485

Dates

published

2018-03

Contributors

author

J. Kúdelčík

• Department of physics, FEE University of Žilina, Univerzitná 1, 010 01 Žilina, Slovakia

author

Š. Hardoň

• Department of physics, FEE University of Žilina, Univerzitná 1, 010 01 Žilina, Slovakia

author

P. Bury

• Department of physics, FEE University of Žilina, Univerzitná 1, 010 01 Žilina, Slovakia

author

M. Timko

• Department of Magnetism, IEP SAS, Watsonova 47, 040 01 Košice, Slovakia

author

P. Kopčanský

• Department of Magnetism, IEP SAS, Watsonova 47, 040 01 Košice, Slovakia

References

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Identifiers

DOI

10.12693/APhysPolA.133.483