<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Experimental and Theoretical Physics</journal-id><journal-title-group><journal-title>Journal of Experimental and Theoretical Physics</journal-title></journal-title-group><issn publication-format="print">0044-4510</issn><issn publication-format="electronic">3034-641X</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.7868/S3034641X25030083</article-id><title-group><article-title>THEORETICAL STUDY OF TERAHERTZ ABSORPTION SPECTRA AND NEUTRON INELASTIC SCATTERING IN FRUSTRATED MAGNET Tb2Ti2O7</article-title><trans-title-group xml:lang="ru"><trans-title>THEORETICAL STUDY OF TERAHERTZ ABSORPTION SPECTRA AND NEUTRON INELASTIC SCATTERING IN FRUSTRATED MAGNET Tb2Ti2O7</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Klekovkina</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Klekovkina</surname><given-names>V. V. </given-names></name></name-alternatives><email>klekovkina_v_v_noemail@ras.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Malkin</surname><given-names>B. Z.</given-names></name><name xml:lang="ru"><surname>Malkin</surname><given-names>B. Z. </given-names></name></name-alternatives><email>malkin_b_z_noemail@ras.ru</email><xref ref-type="aff" rid="aff-3"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru"></institution><institution xml:lang="en">Kazan Federal University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff><institution xml:lang="ru"></institution><institution xml:lang="en">Kazan Federal University</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-03-07" publication-format="electronic"><day>07</day><month>03</month><year>2025</year></pub-date><volume>167</volume><issue>3</issue><fpage>371</fpage><lpage>378</lpage><trans-abstract xml:lang="ru"><p>Using the single-particle approximation we calculate the envelopes of the spectral lines of terahertz absorption and inelastic neutron scattering spectra corresponding to magnetic dipole transitions between the sublevels of Tb3+ ions in the Tb2Ti2O7 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.</p></trans-abstract><funding-group xml:lang="ru"><funding-statement>This work was funded by the subsidy allocated to Kazan Federal University for the state assignment in the sphere of scientific activities (Project № FZSM-2024-0010).</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>This work was funded by the subsidy allocated to Kazan Federal University for the state assignment in the sphere of scientific activities (Project № FZSM-2024-0010).</funding-statement></funding-group></article-meta></front><body></body><back></back></article>