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Integrated Ferroelectrics
An International Journal
Volume 184, 2017 - Issue 1: The International Conference on Technologically Advanced Materials (ICTAM-2016), Part I
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Section C: Nano-Structured Materials

Dielectric and polarization switching studies in nickel nanoparticles dispersed ferroelectric liquid crystal mixtures

KhushbooMaterial Research Laboratory, School of Physics and Material Science, Thapar UniversityPatiala, Punjab, IndiaCorrespondence[email protected] [email protected]
,
Nikhar BhargavaLiquid Crystal Lab, Department of Physics, Dr. B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India
,
Khyati AnandLiquid Crystal Lab, Department of Physics, Dr. B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India
,
Praveen MalikLiquid Crystal Lab, Department of Physics, Dr. B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India
,
Puneet SharmaMaterial Research Laboratory, School of Physics and Material Science, Thapar UniversityPatiala, Punjab, India
,
Divya JayotiLiquid Crystal Lab, Department of Physics, Dr. B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India
&
K. K. RainaDehradun Institute of Technology University, Dehradun, Uttarakhand, India
 show all
Pages 192-198 | Received 07 Nov 2016, Accepted 22 Apr 2017, Published online: 05 Dec 2017
 
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ABSTRACT

We have investigated the effect of nickel nanoparticles (NiNPs) in a pure ferroelectric liquid crystal (FLC) mixture. Dielectric spectroscopy was done in the frequency range of 20 Hz–10 MHz. Switching time, spontaneous polarisation, rotational viscosity has been measured using field reversal technique in SmC* phase. The spontaneous polarisation increases for NiNPs-FLC sample which may be due to the induced dipole moments around FLC molecules. Response time decreases with temperature and NiNPs dispersion. The relaxation frequency and dielectric strength of observed mode in SmC* phase is also discussed in pure FLC and NiNPs-FLC samples. The relaxation frequency in NiNPs-FLC sample decreases than pure FLC sample and found ∼120 Hz.

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