Dielectric and electro-optical studies of a nickel-ferrite-nanoparticle- doped ferroelectric liquid crystal mixture. (1st February 2016)

• Record Type: Journal Article
• Authors: , Khushboo; Sharma, Puneet; Malik, Praveen; Raina, K.K.
• Is Part Of: Phase transitions. Volume 89:Number 2(2016)
• Page Start: 144
• Page End: 154
• Publication Date: 2016-02-01
• Subjects: ferroelectric liquid crystal -- nickel ferrite nanoparticles -- permittivity -- polarization -- response time; Phase transformations (Statistical physics) -- Periodicals; 530.47405
• DOI: 10.1080/01411594.2015.1078463
• Languages: English
• ISSNs: 0141-1594

Abstract

Abstract : Effect of magnetic nanoparticles (nickel ferrite) doping on the dielectric and electro-optical properties of a ferroelectric liquid crystal mixture has been studied. In a doped ferroelectric liquid crystal mixture, dispersion of a small amount (0.25 wt.%) of nickel ferrite nanoparticles decreases the polarization and improves the response time compared to an undoped mixture. The significant changes in the polarization and response time are explained on the basis of dipole–dipole interaction and anchoring phenomena. Dielectric permittivity also increases with increasing the temperature of the SmC* phase and shows a reduction in dielectric loss in a doped sample. A Goldstone mode is clearly observed at ∼200 and ∼500 Hz in an undoped and a doped sample, respectively.