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A possibility was assessed to modify physico-chemical properties offerronematic mixtures by introducing additional mesogenic and non-mesogeniccomponents. The mixture, consisting of RM734 and DIO at the 70:30 weight ratioof the components, was doped with standard nematic 5CB and its chiral isomerCB15. This allowed a substantial lowering of the ferronematic temperaturerange, as well as induction of helical twisting in both nematic (N) andferronematic (NF) phases. The effects of 5CB and CB15 on the NF to N phasetransition were nearly identical, but the isotropic transition temperaturedecreased more strongly upon addition of CB15. Optical transmission vs.temperature measurements showed lower transmittance in the NF phase, probablydue to scattering on the domain boundaries. In the vicinity of the NF - Ntransition, a noticeable range of anomalously low transmission was noted bothon heating and cooling, suggesting a complex character of molecularreorientation features. In the chiral NF (N*F) system, helical twisting wasrecorded using Grandjean-Cano wedge, with the helical pitch decreasing uponcooling in both N* and N*F phases. In the cooling mode, transient undulationsemerged in the N*F phase. The complex picture of the ferronematic transition issupported by POM images taken at different temperatures.

Chiral ferronematic liquid crystals: a physico-chemical analysis of phase transitions and induced helical twisting