Pressure-induced valence change in YbAl3: a combined high pressure inelastic x-ray scattering and theoretical investigation
- Los Alamos National Laboratory
- UNIV OF NV
- UNIV OF AARHUS
- ROYAL INST. OF TECHNOLOGY
- ROYAL INST OF TECHNOLOGY
- HPCAT
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.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 964963
- Report Number(s):
- LA-UR-08-05220; LA-UR-08-5220; TRN: US0903548
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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