Intermediate-valence state of the Sm and Eu in SmB 6 and EuCu 2 Si 2 : neutron spectroscopy data and analysis
Abstract
For this study, 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.
- Authors:
-
- National Research Nuclear Univ. MEPhI (Moscow Engineering Physics Inst.) (Russia); National Research Centre (NRC), Moscow (Russian Federation). Kurchatov Inst. (NRCKI)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Jülich Center for Neutron Science (JCNS) at Heinz Maier-Leibnitz Center (MLZ), Garching (Germany)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Research Nuclear Univ. MEPhI (Moscow Engineering Physics Inst.) (Russia)
- OSTI Identifier:
- 1427612
- Grant/Contract Number:
- AC05-00OR22725; 02.a03.21.0005
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Physics. Condensed Matter
- Additional Journal Information:
- Journal Volume: 30; Journal Issue: 5; Journal ID: ISSN 0953-8984
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; neutron spectroscopy; magnetic form factor; intermediate valence; rare-earth compounds; intermultiplet transitions
Citation Formats
Savchenkov, P. S., Alekseev, P. A., Podlesnyak, A., Kolesnikov, A. I., and Nemkovski, K. S. Intermediate-valence state of the Sm and Eu in SmB 6 and EuCu 2 Si 2 : neutron spectroscopy data and analysis. United States: N. p., 2018.
Web. doi:10.1088/1361-648X/aaa1aa.
Savchenkov, P. S., Alekseev, P. A., Podlesnyak, A., Kolesnikov, A. I., & Nemkovski, K. S. Intermediate-valence state of the Sm and Eu in SmB 6 and EuCu 2 Si 2 : neutron spectroscopy data and analysis. United States. https://doi.org/10.1088/1361-648X/aaa1aa
Savchenkov, P. S., Alekseev, P. A., Podlesnyak, A., Kolesnikov, A. I., and Nemkovski, K. S. 2018.
"Intermediate-valence state of the Sm and Eu in SmB 6 and EuCu 2 Si 2 : neutron spectroscopy data and analysis". United States. https://doi.org/10.1088/1361-648X/aaa1aa. https://www.osti.gov/servlets/purl/1427612.
@article{osti_1427612,
title = {Intermediate-valence state of the Sm and Eu in SmB 6 and EuCu 2 Si 2 : neutron spectroscopy data and analysis},
author = {Savchenkov, P. S. and Alekseev, P. A. and Podlesnyak, A. and Kolesnikov, A. I. and Nemkovski, K. S.},
abstractNote = {For this study, 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.},
doi = {10.1088/1361-648X/aaa1aa},
url = {https://www.osti.gov/biblio/1427612},
journal = {Journal of Physics. Condensed Matter},
issn = {0953-8984},
number = 5,
volume = 30,
place = {United States},
year = {Thu Jan 11 00:00:00 EST 2018},
month = {Thu Jan 11 00:00:00 EST 2018}
}
Web of Science
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