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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doaj-35e6ca2f9c174ab9877d823b85b6698a2020-11-25T01:26:13ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862017-11-01812515252010.3762/bjnano.8.2512190-4286-8-251Alternating current magnetic susceptibility of a ferronematicNatália Tomašovičová0Jozef Kováč1Veronika Gdovinová2Nándor Éber3Tibor Tóth-Katona4Jan Jadżyn5Peter Kopčanský6Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, SlovakiaInstitute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, SlovakiaInstitute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, SlovakiaInstitute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525, Budapest, P. O. Box 49, HungaryInstitute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525, Budapest, P. O. Box 49, HungaryInstitute of Molecular Physics, Polish Academy of Sciences, 60179, Poznan, PolandInstitute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, SlovakiaWe 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.https://doi.org/10.3762/bjnano.8.251ac magnetic susceptibilityferronematicsmagnetic particles |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Natália Tomašovičová Jozef Kováč Veronika Gdovinová Nándor Éber Tibor Tóth-Katona Jan Jadżyn Peter Kopčanský |
spellingShingle |
Natália Tomašovičová Jozef Kováč Veronika Gdovinová Nándor Éber Tibor Tóth-Katona Jan Jadżyn Peter Kopčanský Alternating current magnetic susceptibility of a ferronematic Beilstein Journal of Nanotechnology ac magnetic susceptibility ferronematics magnetic particles |
author_facet |
Natália Tomašovičová Jozef Kováč Veronika Gdovinová Nándor Éber Tibor Tóth-Katona Jan Jadżyn Peter Kopčanský |
author_sort |
Natália Tomašovičová |
title |
Alternating current magnetic susceptibility of a ferronematic |
title_short |
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_sort |
alternating current magnetic susceptibility of a ferronematic |
publisher |
Beilstein-Institut |
series |
Beilstein Journal of Nanotechnology |
issn |
2190-4286 |
publishDate |
2017-11-01 |
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. |
topic |
ac magnetic susceptibility ferronematics magnetic particles |
url |
https://doi.org/10.3762/bjnano.8.251 |
work_keys_str_mv |
AT nataliatomasovicova alternatingcurrentmagneticsusceptibilityofaferronematic AT jozefkovac alternatingcurrentmagneticsusceptibilityofaferronematic AT veronikagdovinova alternatingcurrentmagneticsusceptibilityofaferronematic AT nandoreber alternatingcurrentmagneticsusceptibilityofaferronematic AT tibortothkatona alternatingcurrentmagneticsusceptibilityofaferronematic AT janjadzyn alternatingcurrentmagneticsusceptibilityofaferronematic AT peterkopcansky alternatingcurrentmagneticsusceptibilityofaferronematic |
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1725110079138562048 |