Reviews of topical problems

Current state of the spin exchange theory in dilute solutions of paramagnetic particles. New paradigm of spin exchange and its manifestations in EPR spectroscopy

E.K. Zavoiskii Kazan Physicotechnical Institute, Kazan Scientific Centre of the Russian Academy of Sciences, Sibirskii trakt 10/7, Kazan, 420029, Russian Federation

Kinetic equations are presented for single-particle spin-density matrices with consideration for Heisenberg exchange interaction in bimolecular collisions of particles and dipole—dipole spin—spin interaction between particles. It is shown that interactions between individual paramagnetic particles albeit rather weak compared to exchange interaction may result in a nonequivalent spin exchange. Spin-coherence transfer generates collective modes of quantum spin coherence motion. Collective-resonance lines feature a mixed form (absorption + dispersion). A new interpretation of the exchange narrowing of spectrum in case the rate of spin-coherence transfer is sufficiently large is proposed. An advanced theory of paramagnetic relaxation of paramagnetic particles in dilute solutions due to dipole—dipole interaction is discussed. A modern paradigm of spin exchange is also presented.

Fulltext is available at IOP
Keywords: spin probes, exchange and dipole—ldipole interaction, spin-exchange rate constant, decoherence of spins, spin coherence transfer, EPR spectrum shape, mixed form of spectral lines (absorption + dispersion), exchange narrowing of spectra
PACS: 75.50.Mm, 75.78.−n, 76.30.−v (all)
DOI: 10.3367/UFNe.2018.08.038421
Citation: Salikhov K M "Current state of the spin exchange theory in dilute solutions of paramagnetic particles. New paradigm of spin exchange and its manifestations in EPR spectroscopy" Phys. Usp. 62 951–975 (2019)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Received: 28th, June 2018, revised: 17th, August 2018, 31st, August 2018

Оригинал: Салихов К М «Состояние теории спинового обмена в разбавленных растворах парамагнитных частиц. Новая парадигма спинового обмена и его проявлений в ЭПР-спектроскопии» УФН 189 1017–1043 (2019); DOI: 10.3367/UFNr.2018.08.038421

References (66) Cited by (9) Similar articles (20) ↓

  1. M.V. Avdeev, V.L. Aksenov “Small-angle neutron scattering in structure research of magnetic fluids53 971–993 (2010)
  2. A.B. Roitsin, V.M. Maevskii “Electron paramagnetic resonance of solid surfaces32 891–910 (1989)
  3. S.A. Al’tshuler, B.I. Kochelaev, A.M. Leushin “Paramagnetic absorption of sound4 880–903 (1962)
  4. L.I. Miroshnichenko “Solar cosmic rays: 75 years of research61 323–352 (2018)
  5. A.A. Romanyukha, Yu.N. Shvachko, V.V. Ustinov “Electron paramagnetic resonance and related phenomena in high-temperature superconductors34 (10) 862–882 (1991)
  6. E.P. Bashkin “Spin waves and quantum collective phenomena in Boltzmann gases29 238–259 (1986)
  7. A.B. Roitsin “Electric effects in paramagnetic resonance14 766–782 (1972)
  8. L.D. Bogomolova, V.N. Lazukin, I.V. Chepeleva “Electron paramagnetic resonance in silicon and germanium7 508–548 (1965)
  9. V.A. Ignatchenko, V.P. Tsifrinovich “Resonance phenomena in the region of overlap between NMR and ESR24 42–56 (1981)
  10. M.I. Shliomis “Magnetic fluids17 153–169 (1974)
  11. V.S. Grechishkin, N.E. Ainbinder “Radiospectroscopy of organic semiconductors10 237–255 (1967)
  12. L.A. Blyumenfel’d, V.V. Voevodskii “Radio spectroscopy and contemporary theoretical chemistry2 365–376 (1959)
  13. V.M. Murav’ev, I.V. Kukushkin “Collective plasma excitations in two-dimensional electron systems63 975–993 (2020)
  14. F.F. Komarov “Nano- and microstructuring of solids by swift heavy ions60 435–471 (2017)
  15. G.R. Ivanitskii, A.A. Deev, E.P. Khizhnyak “Long-term dynamic structural memory in water: can it exist?57 37–65 (2014)
  16. I.K. Gainullin “Resonant charge transfer during ion scattering on metallic surfaces63 888–906 (2020)
  17. Yu.I. Ustinovshchikov “Pairwise interatomic interaction in alloys63 668–682 (2020)
  18. D.S. Smirnov, V.N. Mantsevich, M.M. Glazov “Theory of optically detected spin noise in nanosystems64 (9) (2021)
  19. N.B. Babichev, P.S. Bondarev, V.P. Neznamov “Similarity theory in neutron kinetics and its implications for RFNC—VNIIEF applied research54 919–929 (2011)
  20. B.M. Smirnov “Processes involving clusters and small particles in a buffer gas54 691–721 (2011)

The list is formed automatically.

© 1918–2021 Uspekhi Fizicheskikh Nauk
Email: Editorial office contacts About the journal Terms and conditions