1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
High-pressure x-ray diffraction and Raman spectroscopy of phase transitions in Sm2O3
Rent:
Rent this article for
USD
10.1063/1.4795504
/content/aip/journal/jap/113/11/10.1063/1.4795504
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/11/10.1063/1.4795504

Figures

Image of FIG. 1.
FIG. 1.

Crystal structures of (a) cubic C-Sm2O3; (b) monoclinic B-Sm2O3; and (c) hexagonal A-Sm2O3.

Image of FIG. 2.
FIG. 2.

Representative angle dispersive x-ray diffraction patterns (λ = 0.6199 Å) of Sm2O3 under selected pressures: (a) compression, (b) decompression. The diffraction peaks marked with ♥ and ● are contributed by C and A phases, respectively.

Image of FIG. 3.
FIG. 3.

Typical Le Bail refinement of the XRD pattern of Sm2O3. (a) Mixture phases of C and B at pressure of 0.1 MPa, (b) mixture phases of C, B, and A at 4.2 GPa, (c) A phase at 13.5 GPa. Solid line, symbols, and solid line at the bottom represent observed and calculated patterns and their differences, respectively. The rows of vertical bars indicate the diffraction positions.

Image of FIG. 4.
FIG. 4.

The lattice parameters for cubic and hexagonal phases of Sm2O3 with increasing pressures. Solid symbols: This experiment. Empty symbols: Guo's experiment. The limited data points for monoclinic phase are not included.

Image of FIG. 5.
FIG. 5.

Experimental pressure-volume data for Sm2O3. Solid symbols: This experiment. Empty symbols: Guo's experiment. The solid line is the fitting with Birch-Murnaghan equation of state for the P-V data. The estimated error bars lie within the size of the symbols.

Image of FIG. 6.
FIG. 6.

Raman spectra of Sm2O3 under increasing pressure and after fully release of pressure. The Raman peaks marked with *, ♦, and ♥ are contributed by C, B, and A phases, respectively.

Image of FIG. 7.
FIG. 7.

Shift in Raman frequencies of Sm2O3 plotted as a function of pressure. Solid symbols: This experiment. Empty symbols: Hongo's experiment.

Tables

Generic image for table
Table I.

Refined lattice parameters of the different structures of Sm2O3 at various pressures.

Generic image for table
Table II.

Experimental and theoretical bulk moduli, unit-cell volumes, and volume change at phase transitions for Sm2O3.

Generic image for table
Table III.

Mode frequencies, pressure coefficients, and Grüneisen parameters for phonon modes in cubic, monoclinic, and hexagonal phases of Sm2O3. The Raman mode of cubic phase is marked with *.

Loading

Article metrics loading...

/content/aip/journal/jap/113/11/10.1063/1.4795504
2013-03-15
2014-04-23
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High-pressure x-ray diffraction and Raman spectroscopy of phase transitions in Sm2O3
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/11/10.1063/1.4795504
10.1063/1.4795504
SEARCH_EXPAND_ITEM