Theoretical Study of Terahertz Absorption Spectra and Neutron Inelastic Scattering in Frustrated Magnet ${\text{Tb}}_2{\text{Ti}}_2{\text{O}}_7$

Within the framework of the single-particle approximation, the envelopes of the spectral lines of terahertz absorption and inelastic neutron scattering corresponding to magnetic dipole transitions between the sublevels of Tb${}^{3+}$ ions in the Tb${}_2$Ti${}_2$O${}_7$ crystal, split by the field of random deformations induced by point defects of the crystal lattice upon violation of the stoichiometric composition of the crystal, were calculated.