title: Capacitance changes in ferronematic liquid crystals induced by low magnetic fields.
abstract: The response in capacitance to low external magnetic fields (up to 0.1 T) of suspensions of spherical magnetic nanoparticles, single-wall carbon nanotubes (SWCNT), SWCNT functionalized with carboxyl group (SWCNT-COOH), and SWCNT functionalized with Fe(3)O(4) nanoparticles in a nematic liquid crystal has been studied experimentally. The volume concentration of nanoparticles was φ(1)=10(-4) and φ(2)=10(-3). Independent of the type and the volume concentration of the nanoparticles, a linear response to low magnetic fields (far below the magnetic Fréederiksz transition threshold) has been observed, which is not present in the undoped nematic.
authors: Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Košice, Slovakia.
authors: Natália
authors: N
authors: Tomašovičová
authors: Milan
authors: M
authors: Timko
authors: Zuzana
authors: Z
authors: Mitróová
authors: Martina
authors: M
authors: Koneracká
authors: Michal
authors: M
authors: Rajňak
authors: Nándor
authors: N
authors: Éber
authors: Tibor
authors: T
authors: Tóth-Katona
authors: Xavier
authors: X
authors: Chaud
authors: Jan
authors: J
authors: Jadzyn
authors: Peter
authors: P
authors: Kopčanský
mesh_terms: D003198:Computer Simulation; D025802:Electric Capacitance; D050866:Liquid Crystals / Q000737:chemistry* / Q000528:radiation effects*; D060526:Magnetic Fields; D008956:Models, Chemical; D011829:Radiation Dosage