New pressure scale : Raman shift of diamond
Inquiry number
SOL-0000001210
Beamline
BL10XU (High Pressure Research)
Scientific keywords
| A. Sample category | research on method, instrumentation |
|---|---|
| B. Sample category (detail) | insulator, ceramics, solid-state crystal |
| C. Technique | X-ray diffraction |
| D. Technique (detail) | powder diffraction |
| E. Particular condition | microbeam (> 10 µm), high pressure (DAC) |
| F. Photon energy | X-ray (> 40 keV) |
| G. Target information | crystal structure |
Industrial keywords
| level 1---Application area | others |
|---|---|
| level 2---Target | |
| level 3---Target (detail) | |
| level 4---Obtainable information | density, elastic modulus |
| level 5---Technique | diffraction |
Classification
M10.20 powder diffraction
Body text
This application is expected as a new pressure determination up to multi-megabars pressure region. The first-order Raman spectra of diamond anvils of DAC have been measured at the pressure up to 300GPa. In order to determine the volume of the pressure standard, powder x-ray diffraction experiments were carried out at 300K on BL10XU (Y. Akahama et al., Journal of Applied Physics, 96-7(2004)3748).
Figure. The pressure dependence of the Raman shift of diamond.
[ Y. Akahama and H. Kawamura, Journal of Applied Physics 96, 3748-3751 (2004), Fig. 2,
©2004 American Institute of Physics ]
Source of the figure
Private communication/others
Description
兵庫県立大 赤浜裕一氏提供
Technique
The high pressure research beamline BL10XU is designed to perform the X-ray diffraction structure analysis under high-pressure and low/high temperature, using the high brilliance X-rays from the in-vacuum type undulator. The monochromatic and focused X-rays irradiate the sample enclosed in a DAC system, which can generate the pressure up to 300 GPa. The most of the conventional limitations (extremely small size sample area (<100mm), limited diffraction windows, x-ray absorption by diamond and so on) for the DAC high pressure diffraction experiment was extended and upgraded to the high resolution, high angular resolution and high counting statistics diffraction experiment as well as rapid data measurement.
Source of the figure
Presentation material for Beamline Report
Required time for experimental setup
4 hour(s)
Instruments
| Instrument | Purpose | Performance |
|---|---|---|
| DAC diffractometer | high pressure x-ray diffraction | X-ray diffraction at the pressure up to 300GPa |
References
Related experimental techniques
powder x-ray diffraction, single crystal x-ray diffraction, Raman spectroscopy
Questionnaire
The measurement was possible only in SPring-8. Impossible or very difficult in other facilities.
This solution is an application of a main instrument of the beamline.
Ease of measurement
With a great skill
Ease of analysis
Easy
How many shifts were needed for taking whole data in the figure?
Four-nine shifts