Journal Article10.1080/21680396.2017.1304835
Ferromagnetic nematic liquid crystals
Alenka Mertelj,Darja Lisjak +1 more
- 01 Apr 2017
- Vol. 5, Iss: 1, pp 1-33
106
TL;DR: In this paper, the authors present experimental realization and behaviour of the ferromagnetic nematic phase, which is observed in different suspensions of magnetic nanoplatelets, and a brief explanation of a simple macroscopic theory which can be used to understand the main features of the Ferromagnetic phase is presented.
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Abstract: This review presents experimental realization and behaviour of the ferromagnetic nematic phase, which is observed in different suspensions of magnetic nanoplatelets. After a general introduction, the challenges in the synthesis of magnetic nanoplatelets and preparation of the nematic suspensions are discussed. A brief explanation of a simple macroscopic theory, which can be used to understand the main features of the ferromagnetic phase, follows. In the main part, four different ferromagnetic nematic systems are presented: (i) ferromagnetic suspensions of the platelets in nematic liquid crystals, (ii) dense suspensions in an isotropic solvent – ferromagnetic ferrofluids, (iii) biaxial ferromagnetic nematic suspensions, and (iv) chiral ferromagnetic suspensions. The main focus is on the formation of the ferromagnetic phases and the growth of the magnetic domains. At the end, dynamics of ferromagnetic liquid crystals and methods for their observation are briefly discussed.
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Citations
Tunable order in colloids of hard magnetic hexaferrite nanoplatelets
Artem A. Eliseev,Lev A. Trusov,Evgeny O. Anokhin,A. P. Chumakov,Vladimir V. Korolev,Anastasia E. Sleptsova,Peter Boesecke,V. I. Pryakhina,Vladimir Ya. Shur,Pavel E. Kazin,Andrei A. Eliseev +10 more
TL;DR: In this paper, structural ordering in the concentrated magnetic colloids containing 50 × 5 nm hard magnetic disc-like SrFe12O19 nanoparticles was investigated by cryogenic scanning electron microscopy and optical microscopy, magnetic measurements, and smallangle X-ray scattering.
Self-assembly of ferroferric oxide liquid-crystalline nanocomposites bearing cholesteryl mesogens and ionic groups
TL;DR: In this paper , a series of magnetorheological fluids (MRFs) were prepared by self-assembly of magnetic Fe3O4 nanoparticles with PILCs, and the settlement stability and settlement laws were investigated comprehensively and systematically for these MRFs.
Tailored morphologies in two-dimensional ferronematic wells.
TL;DR: In this paper, a dilute uniform suspension of magnetic nanoparticles in a nematic-filled micron-sized shallow well with tangent boundary conditions was modeled as a paradigm system with two coupled order parameters.
Orientational Transitions in Magnetically Compensated Liquid-Crystal Suspensions of Ferromagnetic Carbon Nanotubes
I. A. Chupeev,D. A. Petrov +1 more
TL;DR: Orientational transitions in magnetically compensated liquid-crystal suspensions of ferromagnetic carbon nanotubes are studied. The presence of ferromagnetic carbon nanotubes significantly reduces the threshold of the magnetic Fréedericksz transition.
Shear-Induced First-Order Transition in Polar Liquid Crystals.
TL;DR: It is shown that an additional "shear-elongation parameter" that has been neglected in the recent literature and causes |p| to change under flow can give rise to a shear-induced first-order phase transition from isotropic to polar, and significantly change the rheological properties of both active and passive polar fluids.
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