Introduction of a lanthanide ion into a liquid crystal molecule makes it possible to combine the orientational behavior of mesophases with a high anisotropy of the magnetic susceptibility and luminescent properties of lanthanide ions. However, the use of lanthanidomesogens in the creation of new composite materials for opto- and micro-electronics is limited by their high viscosity and the presence of liquid crystalline properties at high temperatures. In this regard, a practically important task is to obtain lanthanide-containing liquid crystal systems exhibiting nematic mesomorphism in a wide temperature range. Therefore, in this work, we have demonstrated the possibility of creating homogeneous nematic mixtures based on the synthesized paramagnetic liquid crystal 5,5′-diheptadecyl-2,2′-bipyridine dysprosium (III) complex with liquid crystal 1-(4-fluorophenyl)-3-(4-(4-propylcyclohexyl)phenyl)propane-l,3-dione. The latest possesses wide mesophase range and low crystallization temperature. The phase diagrams of the studied mixtures were constructed using the data of polarizing optical microscopy and differential scanning calorimetry. Their thermodynamic and optical characteristics (main values of refractive indices, optical anisotropy, degree of orientational order) have been studied.