Magnetodielectric Properties of Transformer Oil Based Magnetic Fluids

• Authors: M. Timko , P. Kopcansky , M. Molcan , L. Tomco , K. Marton , S. Molokac , P. Rybar , F. Stoian , S. Holotescu , A. Taculescu
• Languages of publication: EN

Abstracts

EN

This contribution is devoted to study of dielectric and magnetodielectric properties in transformer oil based magnetic fluid. The dielectric permittivity and their anisotropy at various mutual orientation electric (50 Hz) and magnetic field were shown at the different volume concentrations of nanoparticles at room temperature. The linear increase of dielectric constant with volume concentration was confirmed which is in good agreement with the theoretical Maxwell prediction. The dielectric anisotropy factor g(B, ω) is very close to g=1. The values of permittivity increased with the increase of volume fraction of magnetite nanoparticles. The highest value of anisotropy characterized by deviation of permittivity Δε=ε_{∥} - ε_{⊥} was found for the highest volume concentration which could mean that no aggregation of magnetite nanoparticles had appeared.

Keywords

EN

47.65.Cb; 77.22.Gm; 77.22.Ch

Discipline

• 77.22.Gm: Dielectric loss and relaxation
• 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-)

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1253-1256

Dates

published

2012-05

Contributors

author

M. Timko

• Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia

author

P. Kopcansky

• Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia

author

M. Molcan

• Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia

author

L. Tomco

• Faculty of Aeronautic, Technical University in Kosice, 041 21 Kosice, Slovakia

author

K. Marton

• Faculty of Electrical Engineering and Informatics, Technical University in Kosice, 042 00 Kosice, Slovakia

author

S. Molokac

• Faculty of Mining, Ecology, Process Control and Geotechnology, TU Kosice, Letna 9, 042 00 Kosice, Slovakia

author

P. Rybar

• Faculty of Mining, Ecology, Process Control and Geotechnology, TU Kosice, Letna 9, 042 00 Kosice, Slovakia

author

F. Stoian

• Politehnica University of Timisoara, Timisoara 300222, Romania

author

S. Holotescu

• Politehnica University of Timisoara, Timisoara 300222, Romania

author

A. Taculescu

• Laboratory of Magnetic Fluids, Romanian Academy - Timisoara Division, Timisoara, Romania

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Identifiers

DOI

10.12693/APhysPolA.121.1253