Eu<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> single crystal at high pressure: Structural phase transitions and amorphization probed by fluorescence spectroscopy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2004

Eu2(MoO4)3 single crystal at high pressure: Structural phase transitions and amorphization probed by fluorescence spectroscopy

Résumé

Pressure-induced phase transitions in Eu2(MoO4)3 single crystals were studied by fluorescence spectroscopy in the range of ambient pressure to 10 GPa. The spectral range investigated was limited to the 5D07FJ, J=0,1,2, transitions. First, low temperature data at ambient pressure were collected for assigning spectra. The spectral changes observed with pressure increase were interpreted in terms of consecutive structural transitions, and possible space groups for the corresponding phases are proposed. A comparison between x-ray diffraction and optical spectroscopic data serves to indicate that amorphization in Eu2(MoO4)3 begins by a disordering of the oxygen sublattice.

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Matériaux
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Dates et versions

hal-00417951 , version 1 (17-09-2009)

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Citer

Denis Machon, Vladimir P. Dmitriev, Vitaly Sinitsyn, Guy Lucazeau. Eu2(MoO4)3 single crystal at high pressure: Structural phase transitions and amorphization probed by fluorescence spectroscopy. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2004, 70 (9), p. 094117(10 p.). ⟨10.1103/PhysRevB.70.094117⟩. ⟨hal-00417951⟩
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