PL EN


Preferences help
enabled [disable] Abstract
Number of results
2017 | 131 | 4 | 887-889
Article title

AC Magnetic Susceptibility of Ferrofluids Exposed to an External Electric Field

Content
Title variants
Languages of publication
EN
Abstracts
EN
It is known that ferrofluid superparamagnetic nanoparticles response to external magnetic fields, often resulting in the formation of elongated clusters along the field. This has a notable impact on dielectric properties of ferrofluids. Here we report on indications of a contrary effect when the magnetic susceptibility of ferrofluids based on transformer oil is influenced by an external electric field. This effect is associated with structural changes in the ferrofluids induced by the external electric fields. Particularly, we focus on a steady state electric field effect, which gives rise to forces acting on the magnetite nanoparticles, leading to the formation of aggregates. In this condition we have measured the ferrofluid AC magnetic susceptibility in parallel and perpendicular configuration of magnetic and electric fields at room temperature. The measurements in both configurations yielded a noticeable decrease in the real susceptibility values with increasing electric field intensity. The result is believed to be caused by the reduction in the total magnetic moment of the ferrofluid. This can be a consequence of the superspin interactions in the aggregates, minimizing the aggregate's energy. Finally, we highlight the necessity of NMR and small angle scattering of polarized neutrons investigations in order to obtain exact information on the magnetic structure induced by the electric forces.
Keywords
Contributors
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia
author
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia
author
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
References
  • [1] R.E. Rosensweig, Ferrohydrodynamics, Courier Dover Publ., New York 1997
  • [2] C. Scherer, A.M. Figueiredo, Braz. J. Phys. 35, No. 3A (2005), doi: 10.1590/S0103-97332005000400018
  • [3] V. Segal, A. Hjortsberg, A. Rabinovich, D. Nattrass, K. Raj, in: Conference record of the 1998 IEEE Int. Symp. on Electrical Insulation, 1998, p. 2, doi: 10.1109/ELINSL.1998.694869
  • [4] J.Ch. Lee, H.S. Seo, Y.J. Kim, Int. J. Therm. Sci. 62, 29 (2012), doi: 10.1016/j.ijthermalsci.2012.03.013
  • [5] J.G. Hwang, M. Zahn, F.M. O'Sullivan, L.A.A. Pettersson, O. Hjortstam, R. Liu, J. Appl. Phys. 107, (2010), doi: 10.1063/1.3267474
  • [6] M. Rajnak, J. Kurimsky, B. Dolnik, P. Kopcansky, N. Tomasovicova, E.A. Taculescu-Moaca, M. Timko, Phys. Rev. E 90, 032310 (2014), doi: 10.1103/PhysRevE.90.032310
  • [7] M. Rajnak, V.I. Petrenko, A.M. Avdeev, I.O. Ivankov, A. Feoktystov, B. Dolnik, J. Kurimsky, P. Kopcansky, M. Timko, Appl. Phys. Lett. 107, 073108 (2015), doi: 10.1063/1.4929342
  • [8] L. Vékás, D. Bica, M.V. Avdeev, China Particuol. 5, 43 (2007), doi: 10.1016/j.cpart.2007.01.015
  • [9] O. Petracic, Superlatt. Microstruct. 47, 569 (2010) , doi: 10.1016/j.spmi.2010.01.009
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv131n4091kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.