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Alternating current magnetic susceptibility of a ferronematic

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 irrever...

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Autores principales: Tomašovičová, Natália, Kováč, Jozef, Gdovinová, Veronika, Éber, Nándor, Tóth-Katona, Tibor, Jadżyn, Jan, Kopčanský, Peter
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5727767/
https://www.ncbi.nlm.nih.gov/pubmed/29259866
http://dx.doi.org/10.3762/bjnano.8.251
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author Tomašovičová, Natália
Kováč, Jozef
Gdovinová, Veronika
Éber, Nándor
Tóth-Katona, Tibor
Jadżyn, Jan
Kopčanský, Peter
author_facet Tomašovičová, Natália
Kováč, Jozef
Gdovinová, Veronika
Éber, Nándor
Tóth-Katona, Tibor
Jadżyn, Jan
Kopčanský, Peter
author_sort Tomašovičová, Natália
collection PubMed
description 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 [Tomašovičová, 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.
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spelling pubmed-57277672017-12-19 Alternating current magnetic susceptibility of a ferronematic Tomašovičová, Natália Kováč, Jozef Gdovinová, Veronika Éber, Nándor Tóth-Katona, Tibor Jadżyn, Jan Kopčanský, Peter Beilstein J Nanotechnol Full Research Paper 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 [Tomašovičová, 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. Beilstein-Institut 2017-11-27 /pmc/articles/PMC5727767/ /pubmed/29259866 http://dx.doi.org/10.3762/bjnano.8.251 Text en Copyright © 2017, Tomašovičová et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Tomašovičová, Natália
Kováč, Jozef
Gdovinová, Veronika
Éber, Nándor
Tóth-Katona, Tibor
Jadżyn, Jan
Kopčanský, Peter
Alternating current magnetic susceptibility of a ferronematic
title Alternating current magnetic susceptibility of a ferronematic
title_full Alternating current magnetic susceptibility of a ferronematic
title_fullStr Alternating current magnetic susceptibility of a ferronematic
title_full_unstemmed Alternating current magnetic susceptibility of a ferronematic
title_short Alternating current magnetic susceptibility of a ferronematic
title_sort alternating current magnetic susceptibility of a ferronematic
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5727767/
https://www.ncbi.nlm.nih.gov/pubmed/29259866
http://dx.doi.org/10.3762/bjnano.8.251
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