Size-dependent studies in ferromagnetic nanoparticles dispersed ferroelectric liquid crystal mixtures |
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| Authors: | Khushboo P Sharma K K Raina |
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| Institution: | 1. Material Research Laboratory, School of Physics and Material Science, Thapar University Patiala, Patiala, India;2. Dehradun Institute of Technology University, Dehradun, India |
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| Abstract: | In the present study, ferromagnetic nickel nanoparticles (NiNPs) of size (~20 nm, 40 nm) into ferroelectric liquid crystal (FLC) mixture has been dispersed and investigated. Effect of size of NiNPs on the electro-optic, dielectric and optical properties of FLC mixture have been studied and discussed. A minor improvement in spontaneous polarisation, rotational viscosity and faster response time in NiNPs-FLC samples than pure FLC is noticed. Goldstone mode of relaxation frequency ~100 Hz is detected in all samples and follow a Debye type relaxation behaviour. In addition, it is observed that size of NiNPs does not have any remarkable effect on relaxation frequency and dielectric strength. A single absorption peak at 363, 362 Hz is also noticed in pure FLC and NiNPs-FLC samples. |
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| Keywords: | Ferroelectric liquid crystal nickel nanoparticles permittivity spontaneous polarisation response time relaxation frequency absorbance |
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