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Liquid Crystals Volume 42, 2015 - Issue 3
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Original Articles

Dielectric properties of magnetic nanoparticles’ suspension in a ferroelectric liquid crystal

E.V. PopovaDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, UkraineCorrespondence[email protected]
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S.A. GamzaevaDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, UkraineView further author information
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А.I. KrivosheyDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, UkraineView further author information
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A.P. KryshtalDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, Ukraine;V.N. Karazin Kharkiv National University, Kharkiv, UkraineView further author information
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A.P. FedoryakoDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, UkraineView further author information
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M.F. ProdanovDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, UkraineView further author information
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M.A. KolosovDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, Ukraine;V.N. Karazin Kharkiv National University, Kharkiv, UkraineView further author information
&
V.V. VashchenkoDepartment of Technology of Organic Compounds, State Scientific Institution “Institute for Single Crystals”, NAS of Ukraine, Kharkov, UkraineView further author information
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Pages 334-343 | Received 12 Sep 2014, Accepted 13 Nov 2014, Published online: 09 Mar 2015
 
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Abstract

Colloids of elongated γ-Fe2O3 magnetic nanoparticles (NPs) in a ferroelectric liquid crystal (FLC) were studied. Decreasing the dielectric strength of the Goldstone mode and changing the value of Cole–Cole parameter were found in the suspensions. It was also shown that the effect of introducing magnetic particles into a FLC consists of increasing the electric field strength magnitude required for unwinding its helical structure. Effect of magnetic field on dielectric properties of the FLC colloid was also studied. Dielectric constant measured under static magnetic field is different for the FLC host and FLC doped with the NPs.

Acknowledgement

We thank Dr. Th. Gurley (USA) for useful discussion on the manuscript.

Additional information

Funding

This work was supported by the NAS of Ukraine [grant numbers 0111U000744 and 0110U007372]; State Agency on Science, Innovations and Informatization of Ukraine [grant number F53.2/048] and STCU [grant number 5205].

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