The effects of magnetic nanoparticles on oscillating behavior of a nematic liquid crystal cell

Shoarinejad, S.; Ghazavi, M.

doi:10.1080/1539445x.2017.1287086

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…While the consequences of the behavior of FNs in static magnetic fields have been studied widely, much less is known about their dynamic properties. Theoretical calculations have been performed for various geometries to uncover how the magnetic field affects the flow properties of FNs [ 1 , 20 ], the pattern forming instabilities in FNs [ 8 ] or the behavior in rotating magnetic fields [ 21 – 25 ]. Experimental studies on dynamics are very scarce [ 26 ], thus most theoretical predictions still await experimental justification.…”

Section: Introductionmentioning

confidence: 99%

Alternating current magnetic susceptibility of a ferronematic

Tomašovičová

Kováč

Gdovinová

et al. 2017

Beilstein J. Nanotechnol.

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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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