High-pressure x-ray diffraction and Raman spectroscopy of phase transitions in Sm2O3
Jiang, S; Liu J(刘景); Lin CL(林传龙); Li XD(李晓东); 李延春; Liu, J; Lin, CL; Li, XD; Li, YC
AbstractThe structural phase transitions in Sm2O3 with mixed phases of cubic and monoclinic as starting material were studied by in situ high-pressure synchrotron angle dispersive x-ray diffraction and Raman scattering measurements up to 40.1 GPa and 41.0 GPa, respectively. The x-ray diffraction data indicate that the monoclinic and cubic phases begin to transform to a hexagonal phase at 2.5 and 4.2 GPa, respectively. The hexagonal phase is stable up to at least 40.1 GPa and could not be quenched to ambient conditions. These phase transitions have also been confirmed by Raman spectroscopy. A third-order Birch-Murnaghan fit based on the observed pressure-volume data yields zero pressure bulk moduli B-0 = 149(2), 153(7), and 155(5) GPa for cubic, monoclinic, and hexagonal phases, respectively, when their first pressure derivatives (B'(0)) were fixed as 4. The pressure coefficients of Raman peaks and the mode Gruneisen parameters of different Raman modes were also obtained. Coupled with previous results, we conclude that the transition pressure of medium rare-earth sesquioxides from the cubic and monoclinic to the hexagonal phase increase with the decreasing of the cation radius. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795504]
Subject AreaPhysics
Indexed BySCI ; ADS
WOS IDWOS:000316545200016
ADS Bibcode2013JAP...113k3502J
ADS URLhttps://ui.adsabs.harvard.edu/abs/2013JAP...113k3502J
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2013JAP...113k3502J/citations
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Cited Times:17 [ADS]
Document Type期刊论文
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GB/T 7714
Jiang, S,Liu J,Lin CL,et al. High-pressure x-ray diffraction and Raman spectroscopy of phase transitions in Sm2O3[J]. JOURNAL OF APPLIED PHYSICS,2013,113(11):113502.
APA Jiang, S.,刘景.,林传龙.,李晓东.,李延春; Liu, J.,...&Li, YC.(2013).High-pressure x-ray diffraction and Raman spectroscopy of phase transitions in Sm2O3.JOURNAL OF APPLIED PHYSICS,113(11),113502.
MLA Jiang, S,et al."High-pressure x-ray diffraction and Raman spectroscopy of phase transitions in Sm2O3".JOURNAL OF APPLIED PHYSICS 113.11(2013):113502.
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