Abstract
The response in attenuation of surface acoustic wave (SAW) of frequency 30MHz propagating along ferronematic liquid crystals (6CHBT) to both electric and low magnetic field (up to 0.25 T) has been studied experimentally. Two low volume concentrations (Φ1=1×10-5 and Φ2=1×10-4) of spherical magnetic nanoparticles were added to liquid crystal during its isotropic phase. In contrast to undoped 6CHTB the distinctive SAW attenuation responses induced by both electric and magnetic fields in ferronematic liquid crystals below Fréedericksz transition have been observed suggesting structural changes and the orientational coupling between the magnetic moment of magnetic particles and the director of the liquid crystal. The geometrical re-ranking of magnetic nanoparticles was registered for some orientations of magnetic field, too. Observed results confirmed the significant influence of the presence of magnetic nanoparticles on the structural properties of 6CHTB.
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