%0 Journal Article
%A Savchenkov, P. S.
%A Alekseev, P. A.
%A Podlesnyak, A.
%A Kolesnikov, A. I.
%A Nemkovski, K. S.
%T Intermediate-valence state of the Sm and Eu in SmB$_{6}$ and EuCu$_{2}$Si$_{2}$ : neutron spectroscopy data and analysis
%J Journal of physics / Condensed matter
%V 30
%N 5
%@ 1361-648X
%C Bristol
%I IOP Publ.
%M FZJ-2018-01886
%P 055801 -
%D 2018
%X Magnetic neutron scattering data for Sm (SmB6, Sm(Y)S) and Eu (EuCu2Si2−x Ge x ) intermediate-valence compounds have been analysed in terms of a generalized model of the intermediate-radius exciton. Special attention is paid to the correlation between the average ion's valence and parameters of the low-energy excitation in the neutron spectra, such as the resonance mode, including its magnetic form factor. Along with specific features of the formation of the intermediate-valence state for Sm and Eu ions, common physical mechanisms have been revealed for systems based on these elements from the middle of the rare-earth series. A consistent description of the existing experimental data has been obtained by using the concept of a loosely bound hole for the Eu f-electron shell in the intermediate-valence state, in analogy with the previously established loosely bound electron model for the Sm ion.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000422729600001
%R 10.1088/1361-648X/aaa1aa
%U https://juser.fz-juelich.de/record/844471