Effect of temperature on memory effect in nematic phase of liquid crystal and their composites with aerosil and geothite nanoparticles

0577701 - FZÚ 2024 RIV NL eng J - Článek v odborném periodiku
Zakutanská, K. - Miakota, D. - Lacková, V. - Jeng, S.-C. - Weglowska, D. - Agresti, F. - Jarošová, Markéta - Kopčanský, P. - Tomašovičová, N.
Effect of temperature on memory effect in nematic phase of liquid crystal and their composites with aerosil and geothite nanoparticles.
Journal of Molecular Liquids. Roč. 391, Dec (2023), č. článku 123357. ISSN 0167-7322. E-ISSN 1873-3166
Grant CEP: GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: liquid crystals * aerosil nanoparticles * magnetic nanoparticles * non-volatile memory
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 6, rok: 2022
Způsob publikování: Open access

Liquid crystal doped with aerosil nanoparticles is known for exhibiting an electromechanical memory effect. After exposing the composite to the electric field the state induced by the electric field stays remembered due to the presence of aerosil nanoparticles. In this paper, we investigated the memory effect induced by electric and magnetic fields. Liquid crystal 4-cyano-4′-pentylbiphenyl doped with non-magnetic aerosil nanoparticles and a mixture of aerosil nanoparticles and elongated magnetic goethite nanoparticles were explored via capacitance measurements. Studied systems exhibited hysteresis in capacitance-voltage and capacitance-magnetic field dependences. The measurements revealed a great impact of temperature and heating/cooling rate on the hysteresis of the system. Observed electromechanical and magnetomechanical memory effect provides potential use of the system as voltage-driven or magnetic field-driven non-volatile memory devices.
Trvalý link: https://hdl.handle.net/11104/0346823