Аннотация:Temperature dependencies of the electrical resistivity, magnetic susceptibility, and heat capacity have been obtained in the cubic phase of ${\mathrm{TbGe}}_{2.85}$ (the ${\mathrm{AuCu}}_{3}$ structure), synthesized at high pressure. The macroscopic measurements indicate that a charge density wave is formed below 145 K and an antiferromagnetic ordering is realized below 19 K. Hyperfine interaction data obtained with the time differential perturbed angular correlation method with $^{111}\mathrm{Cd}$ probes inserted in the ${\mathrm{TbGe}}_{2.85}$ lattice suggest that the charge density wave is incommensurate in the temperature region 19--145 K, but becomes commensurate below 19 K. The neutron diffraction reveals a complex antiferromagnetic spiral structure in the magnetically ordered phase. We discuss relations between the charge density wave and helical ordering in ${\mathrm{TbGe}}_{2.85}$ and ${\mathrm{TbPd}}_{3}$.
