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Title: Pressure-induced valence change in YbAl3: a combined high pressure inelastic x-ray scattering and theoretical investigation

Abstract

High resolution x-ray absorption (XAS) experiments in the partial fluorescence yield mode (PFY) and resonant inelastic x-ray emission (RXES) measurements under pressure were performed on the intermediate valence compound YbAl{sub 3} up to 38 GPa. The results of the Yb L{sub 3} PFY-XAS and RXES studies show a smooth valence increase in YbAl{sub 3} from 2.75 to 2.93 at ambient to 38 GPa. In-situ angle dispersive synchrotron high pressure x-ray diffraction experiments carried out using a diamond cell at room temperature to study the equation of state showed the ambient cubic phase stable up to 40 GPa. The results obtained from self-interaction corrected local spin density functional calculations to understand the pressure effect on the Yb valence and compressibility are in good agreement with the experimental results.

Authors:
 [1];  [2];  [3];  [4];  [2];  [5];  [6];  [2]
  1. Los Alamos National Laboratory
  2. UNIV OF NV
  3. UNIV OF AARHUS
  4. ROYAL INST. OF TECHNOLOGY
  5. ROYAL INST OF TECHNOLOGY
  6. HPCAT
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
964963
Report Number(s):
LA-UR-08-05220; LA-UR-08-5220
Journal ID: ISSN 1098-0121; TRN: US0903548
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Name: Phys. Rev. B; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36; ABSORPTION; COMPRESSIBILITY; DIAMONDS; FLUORESCENCE; FUNCTIONALS; PRESSURE DEPENDENCE; RESOLUTION; SCATTERING; SPIN; SYNCHROTRONS; VALENCE; X-RAY DIFFRACTION

Citation Formats

Bauer, E D, Kumar, R S, Svane, A, Vaitheeswaran, G, Nicol, M F, Kanchana, V, Hu, M, and Cornelius, A L. Pressure-induced valence change in YbAl3: a combined high pressure inelastic x-ray scattering and theoretical investigation. United States: N. p., 2008. Web.
Bauer, E D, Kumar, R S, Svane, A, Vaitheeswaran, G, Nicol, M F, Kanchana, V, Hu, M, & Cornelius, A L. Pressure-induced valence change in YbAl3: a combined high pressure inelastic x-ray scattering and theoretical investigation. United States.
Bauer, E D, Kumar, R S, Svane, A, Vaitheeswaran, G, Nicol, M F, Kanchana, V, Hu, M, and Cornelius, A L. Tue . "Pressure-induced valence change in YbAl3: a combined high pressure inelastic x-ray scattering and theoretical investigation". United States. https://www.osti.gov/servlets/purl/964963.
@article{osti_964963,
title = {Pressure-induced valence change in YbAl3: a combined high pressure inelastic x-ray scattering and theoretical investigation},
author = {Bauer, E D and Kumar, R S and Svane, A and Vaitheeswaran, G and Nicol, M F and Kanchana, V and Hu, M and Cornelius, A L},
abstractNote = {High resolution x-ray absorption (XAS) experiments in the partial fluorescence yield mode (PFY) and resonant inelastic x-ray emission (RXES) measurements under pressure were performed on the intermediate valence compound YbAl{sub 3} up to 38 GPa. The results of the Yb L{sub 3} PFY-XAS and RXES studies show a smooth valence increase in YbAl{sub 3} from 2.75 to 2.93 at ambient to 38 GPa. In-situ angle dispersive synchrotron high pressure x-ray diffraction experiments carried out using a diamond cell at room temperature to study the equation of state showed the ambient cubic phase stable up to 40 GPa. The results obtained from self-interaction corrected local spin density functional calculations to understand the pressure effect on the Yb valence and compressibility are in good agreement with the experimental results.},
doi = {},
url = {https://www.osti.gov/biblio/964963}, journal = {Phys. Rev. B},
issn = {1098-0121},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {1}
}