Spin dynamics of the intermediate-valence compound EuCu{sub 2}Si{sub 2}

Journal Article · Sun Jul 15 00:00:00 EDT 2007 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776107070047· OSTI ID:21075819

Alekseev, P A ^[1]; Mignot, J -M ^[2]; Nemkovski, K S; Nefeodova, E V ^[1]; Kuznetsov, A V ^[3]; Bewley, R I ^[4]; Gribanov, A V ^[5]

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1. Russian Research Centre 'Kurchatov Institute' (Russian Federation)
2. CEA/Saclay, Laboratoire Leon Brillouin (France)
3. Moscow Engineering Physics Institute (State University) (Russian Federation)
4. ISIS, Rutherford Appleton Laboratory (United Kingdom)
5. Moscow State University (Russian Federation)

The dynamic magnetic response of the intermediate-valence compound EuCu{sub 2}Si{sub 2} has been studied using inelastic neutron scattering. At low temperatures, strong renormalization of the {sup 7}F{sub 0} {sup {yields}} {sup 7}F{sub 1} spin-orbit transition energy is detected; it is likely to be related to partial delocalization of the f electrons of Eu. An increase in the temperature increases the valence instability of europium and results in further changes in the magnetic excitation spectrum parameters and the appearance of an intense quasi-elastic component.

• OSTI ID: 21075819
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 105, Issue 1; Other Information: DOI: 10.1134/S1063776107070047; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER SILICIDES
ELECTRONS
EUROPIUM COMPOUNDS
EXCITATION
INELASTIC SCATTERING
INSTABILITY
L-S COUPLING
NEUTRON DIFFRACTION
NEUTRON REACTIONS
RENORMALIZATION
SPIN
VALENCE