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A comparative analysis of the properties of FeSe${}_{1-x}$Te${}_{x}$ crystalsin the range of x values of about 0.4 and pure FeSe crystals is presented. Wefound that the anomaly in R (T) at the structural transition for the formerdiffers significantly from the corresponding anomaly for the latter. Thisindicates a change in the type of the ground state in the studied compounds.Within the framework of the crystal field model, this can be explained as aconsequence of a change in the distortion of the tetrahedral environment ofiron, which leads to a change in the positions of the energy levels within$t_{2g}$ multiplet. Depending on the mutual position of the degenerate xz andyz levels and the xy level, the type of transition can change from orbitalordering to magnetic ordering.

Crossover from nematic to magnetic low-temperature ground state in Fe(Se,Te) compounds