Low-temperature paramagnets are a class of spin systems that remain in a disordered paramagnetic state down to the lowest temperatures despite the presence of noticeable spin-spin exchange coupling. The magnetic properties of these systems at low temperatures are due to collective spin excitations, and, in a magnetic field, such spin systems can demonstrate field-induced antiferromagnetic ordering. Magnetic resonance allows studying the details of the excitation spectrum in the paramagnetic low-field and ordered high-field phases of low-temperature paramagnets, revealing the fine structure of the spectrum of collective excitations, details of the interaction between excitations, changes in the excitation spectrum induced by the magnetic field, and the emergence of non-Goldstone modes of spin dynamics in high-field ordered phases.

Keywords: spin liquid, magnetic resonance, low-temperature paramagnets, quantum magnets PACS: 75.10.Jm, 75.50.Ee, 76.30.−v, 76.50.+g (all) DOI: 10.3367/UFNe.2024.07.039756 URL: https://ufn.ru/en/articles/2024/12/g/ 001460085800007 2-s2.0-85217279105 2024PhyU...67.1248G Citation: Glazkov V N "Magnetic resonance in low-temperature paramagnets" Phys. Usp. 67 1248–1253 (2024) BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks RT Journal T1 Magnetic resonance in low-temperature paramagnets A1 Glazkov,V.N. PB Physics-Uspekhi PY 2024 FD 10 Dec, 2024 JF Physics-Uspekhi JO Phys. Usp. VO 67 IS 12 SP 1248-1253 DO 10.3367/UFNe.2024.07.039756 LK https://ufn.ru/en/articles/2024/12/g/ Received: 1st, August 2024, accepted: 10th, July 2024 Оригинал: Глазков В Н «Магнитный резонанс в низкотемпературных парамагнетиках» УФН 194 1320–1325 (2024); DOI: 10.3367/UFNr.2024.07.039756