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arXiv · 1609.03786

Biasing the ferronematic - a new way to detect weak magnetic field

Natalia Tomasovicova·Jozef Kovac·Yuriy Raikher·Nandor Eber·Tibor Toth-Katona·Veronika Gdovinova·Jan Jadzyn·Richard Pincak·Peter Kopcansky
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Abstract

Magnetic properties of a ferronematic, i.e., nematic liquid crystal doped with magnetic nanoparticles in low volume concentration are studied, with the focus on the ac magnetic susceptibility. A weak dc bias magnetic field (units of Oe) applied to the ferronematic in its isotropic phase increases the ac magnetic susceptibility considerably. Passage of the isotropic-to-nematic phase transition resets this enhancement irreversibly (unless the dc bias field is applied again in the isotropic phase). These experimental findings pave a way to application possibilities, such as low magnetic field sensors, or basic logical elements for information storage.

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Natalia Tomasovicova, Jozef Kovac, Yuriy Raikher, Nandor Eber, Tibor Toth-Katona, Veronika Gdovinova, Jan Jadzyn, Richard Pincak, Peter Kopcansky. 2016-09-13. Biasing the ferronematic - a new way to detect weak magnetic field. https://doi.org/10.1039/c6sm00354k

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