Alternating current magnetic susceptibility of a ferronematic

Natália Tomašovicová, Jozef Kovác, Veronika Gdovinová, Nándor éber, Tibor Tóth-Katona, Jan Jadzyn, Peter Kopcanskỳ

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report on experimental studies focusing on the dynamic ac magnetic susceptibility of a ferronematic. It has been shown recently, that in the isotropic phase of a ferronematic, a weak dc bias magnetic field of a few oersteds increases the ac magnetic susceptibility. This increment vanishes irreversibly if the substance is cooled down to the nematic phase, but can be reinduced by applying the dc bias field again in the isotropic phase [Tomašovicová, N. et al. Soft Matter 2016, 12, 5780-5786]. The effect has no analogue in the neat host liquid crystal. Here, we demonstrate that by doubling the concentration of the magnetic nanoparticles, the range of the dc bias magnetic field to which the ferronematic is sensitive without saturation can be increased by about two orders of magnitude. This finding paves a way to application possibilities, such as low magnetic field sensors, or basic logical elements for information storage.

Original languageEnglish
Pages (from-to)2515-2520
Number of pages6
JournalBeilstein Journal of Nanotechnology
Volume8
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Ac magnetic susceptibility
  • Ferronematics
  • Magnetic particles

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

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  • Cite this

    Tomašovicová, N., Kovác, J., Gdovinová, V., éber, N., Tóth-Katona, T., Jadzyn, J., & Kopcanskỳ, P. (2017). Alternating current magnetic susceptibility of a ferronematic. Beilstein Journal of Nanotechnology, 8(1), 2515-2520. https://doi.org/10.3762/bjnano.8.251