Neutron magnetic form factor in studies of f-electron instability

P.A. Alekseev^†^a, b, V.N. Lazukov^‡^a, P.S. Savchenkov^§^a, b
^aNational Research Centre ‘Kurchatov Institute’, pl. akad. Kurchatova 1, Moscow, 123182, Russian Federation
^bNational Research Nuclear University ‘MEPhI’, Kashirskoe shosse 31, Moscow, 115409, Russian Federation

The main results obtained in measurements of neutron magnetic form factors for rare earth systems with strong electronic correlations are presented. It is shown that in some cases neutron spectroscopy methods can provide information on the valence unstable state in the f-electron system, which is unique as regards the development of adequate physical concepts. Studies of the magnetic form factor in intermediate-valence systems based on Sm (SmB₆, SmS) and Eu (EuCu₂Si₂2 type) and their impact on the shaping of a realistic description of the physical nature of the intermediate valence state are discussed in detail.

Keywords: neutron spectroscopy, intermediate valence, magnetic form factor, strongly correlated electron systems
PACS: 61.05.F−, 61.66.Dk, 75.10.−b, 75.30.Mb, 75.40.Gb (all)
DOI: 10.3367/UFNe.2024.09.039748
URL: https://ufn.ru/en/articles/2025/7/b/
Scopus

2-s2.0-105013789370
ADS NASA

2025PhyU...68..653A
Citation: Alekseev P A, Lazukov V N, Savchenkov P S "Neutron magnetic form factor in studies of f-electron instability" Phys. Usp. 68 653–667 (2025)

BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Received: 2nd, July 2024, revised: 4th, September 2024, accepted: 9th, September 2024

Оригинал: Алексеев П А, Лазуков В Н, Савченков П С «Нейтронный магнитный формфактор в исследованиях f-электронной нестабильности» УФН 195 695–711 (2025); DOI: 10.3367/UFNr.2024.09.039748

References (77) Similar articles (20) ↓

P.A. Alekseev “Neutron spectroscopy and strongly correlated electrons: a view from the inside” Phys. Usp. 60 58–90 (2017)
P.A. Alekseev “High borides: determining the features and details of lattice dynamics from neutron spectroscopy” Phys. Usp. 58 330–344 (2015)
A.M. Balagurov, I.S. Golovin “Neutron scattering in studies of Fe-based functional alloys (Fe—Ga, Fe—Al)” Phys. Usp. 64 702–721 (2021)
V.V. Ustinov, I.A. Yasyulevich “Chiral spintronics of helimagnets” Phys. Usp. 68 1001–1028 (2025)
G.R. Khutsishvili “Spin diffusion” Sov. Phys. Usp. 8 743–769 (1966)
E.Z. Valiev “Phenomenological theory of magnetoelastic interactions in Invars and Elinvars” Sov. Phys. Usp. 34 (8) 685–704 (1991)
V.Yu. Irkhin “Unusual magnetism of the Kondo lattice” Phys. Usp. 60 747–761 (2017)
S.V. Maleev “Polarized neutron scattering in magnets” Phys. Usp. 45 569–596 (2002)
Yu.A. Izyumov, Yu.N. Skryabin “Double exchange model and the unique properties of the manganites” Phys. Usp. 44 109–134 (2001)
Ya.B. Zel’dovich, A.L. Buchachenko, E.L. Frankevich “Magnetic-spin effects in chemistry and molecular physics” Sov. Phys. Usp. 31 385–408 (1988)
Yu.A. Izyumov, E.Z. Kurmaev “Materials with strong electron correlations” Phys. Usp. 51 23–56 (2008)
A.A. Katanin, V.Yu. Irkhin “Magnetic order and spin fluctuations in low-dimensional insulating systems” Phys. Usp. 50 613–635 (2007)
K.N. Alekseev, G.P. Berman et al “Dynamical chaos in magnetic systems” Sov. Phys. Usp. 35 (7) 572–590 (1992)
Yu.A. Izyumov “Solitons in quasi-one-dimensional magnetic materials and their study by neutron scattering” Sov. Phys. Usp. 31 689–712 (1988)
M.I. Kaganov, A.V. Chubukov “Interacting magnons” Sov. Phys. Usp. 30 1015–1040 (1987)
I.Ya. Korenblit, E.F. Shender “Ferromagnetism of disordered systems” Sov. Phys. Usp. 21 832–851 (1978)
A.A. Abrikosov “Magnetic impurities in nonmagnetic metals” Sov. Phys. Usp. 12 168–181 (1969)
A.A. Pervishko, D.I. Yudin “Microscopic approach to the description of spin torques in two-dimensional Rashba ferromagnets and antiferromagnets” Phys. Usp. 65 215–226 (2022)
V.P. Mineev “Superconductivity in uranium ferromagnets” Phys. Usp. 60 121–148 (2017)
D.I. Sementsov, A.M. Shutyi “Nonlinear regular and stochastic dynamics of magnetization in thin-film structures” Phys. Usp. 50 793–818 (2007)

The list is formed automatically.