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Experimental and theoretical study of α-Eu2(MoO4)3 under compression
DOI:
10.1088/0953-8984/27/46/465401
Authors:
Candelaria
Guzman-Afonso
(Universidad de La Laguna)
,
Sergio
Leon Luis
(Universidad de La Laguna)
,
Juan Angel
Sans Tresserras
(Universitat Politècnica de València, Spain)
,
Maria Cristina
Gonzalez Silgo
(Universidad de La Laguna)
,
Placida
Rodríguez-Hernández
(Universidad de La Laguna)
,
Silvana
Radescu
(Universidad de La Laguna)
,
Alfonso
Muñoz
(Universidad de La Laguna)
,
Juan Javier
Lopez Solano
(Universidad de La Laguna)
,
Daniel
Errandonea
(Universidad de Valencia)
,
Francisco Javier
Manjon Herrera
(Universitat Politècnica de València)
,
Ulises Ruyman
Rodríguez-Mendoza
(Universidad de La Laguna)
,
Victor
Lavin
(Universidad de La Laguna)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of Physics: Condensed Matter
, VOL 27 (46)
, PAGES 465401
State:
Published (Approved)
Published:
November 2015
Diamond Proposal Number(s):
1746
Abstract: The compression process in the α-phase of europium trimolybdate was revised employing several experimental techniques. X-ray diffraction (using synchrotron and laboratory radiation sources), Raman scattering and photoluminescence experiments were performed up to a maximum pressure of 21 GPa. In addition, the crystal structure and Raman mode frequencies have been studied by means of first-principles density functional based methods. Results suggest that the compression process of α-Eu2(MoO4)3 can be described by three stages. Below 8 GPa, the α-phase suffers an isotropic contraction of the crystal structure. Between 8 and 12 GPa, the compound undergoes an anisotropic compression due to distortion and rotation of the MoO4 tetrahedra. At pressures above 12 GPa, the amorphization process starts without any previous occurrence of a crystalline-crystalline phase transition in the whole range of pressure. This behavior clearly differs from the process of compression and amorphization in trimolybdates with β′-phase and tritungstates with α-phase.
Journal Keywords: High Pressure; X-Ray Diffraction; Raman Scaterring; Photoluminescence; Rare Earth Trimolybdates; ?-Phase
Subject Areas:
Materials,
Physics
Instruments:
I15-Extreme Conditions
Added On:
24/11/2015 04:24
Discipline Tags:
Physics
Hard condensed matter - structures
Materials Science
Technical Tags:
Diffraction
High-Pressure X-ray Diffraction (HP-XRD)