In situ impedance measurements in diamond anvil cell under high pressure

2010 ◽  
Vol 81 (1) ◽  
pp. 013904 ◽  
Author(s):  
Yue Wang ◽  
Yonghao Han ◽  
Chunxiao Gao ◽  
Yanzhang Ma ◽  
Cailong Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Diamond Anvil Cell ◽  
Impedance Measurements ◽  
Diamond Anvil

PHASE TRANSITION IN LAYERED PEROVSKITE LIKE MANGANATE Ca3Mn2O7 UNDER HIGH PRESSURE

2001 ◽  
Vol 15 (18) ◽  
pp. 2491-2497 ◽  
Author(s):  
J. L. ZHU ◽  
L. C. CHEN ◽  
R. C. YU ◽  
F. Y. LI ◽  
J. LIU ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Diamond Anvil Cell ◽  
The Other ◽  
Layered Perovskite ◽  
X Ray Diffraction ◽  
Two Phase ◽  
X Ray ◽  
Diamond Anvil

In situ high pressure energy dispersive X-ray diffraction measurements on layered perovskite-like manganate Ca 3 Mn 2 O 7 under pressures up to 35 GPa have been performed by using diamond anvil cell with synchrotron radiation. The results show that the structure of layered perovskite-like manganate Ca 3 Mn 2 O 7 is unstable under pressure due to the easy compression of NaCl-type blocks. The structure of Ca 3 Mn 2 O 7 underwent two phase transitions under pressures in the range of 0~35 GPa. One was at about 1.3 GPa with the crystal structure changing from tetragonal to orthorhombic. The other was at about 9.5 GPa with the crystal structure changing from orthorhombic back to another tetragonal.

scholarly journals Reliability of multigrain indexing for orthorhombic polycrystals above 1 Mbar: application to MgSiO3 post-perovskite

2017 ◽  
Vol 50 (1) ◽  
pp. 120-130 ◽  
Author(s):  
Christopher Langrand ◽  
Nadège Hilairet ◽  
Carole Nisr ◽  
Mathieu Roskosz ◽  
Gábor Ribárik ◽  
...  
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Grain Orientation ◽  
Diamond Anvil Cell ◽  
Polycrystalline Material ◽  
Data Set ◽  
Grain Orientations ◽  
Diamond Anvil ◽  
Diffraction Peaks

This paper describes a methodology for characterizing the orientation and position of grains of an orthorhombic polycrystalline material at high pressure in a diamond anvil cell. The applicability and resolution of the method are validated by simulations and tested on an experimental data set collected on MgSiO3 post-perovskite at 135 GPa. In the simulations, ∼95% of the grains can be indexed successfully with ∼80% of the peaks assigned. The best theoretical average resolutions in grain orientation and position are 0.02° and 1.4 µm, respectively. The indexing of experimental data leads to 159 grains of post-perovskite with 30% of the diffraction peaks assigned with a 0.2–0.4° resolution in grain orientation. The resolution in grain location is not sufficient for in situ analysis of spatial relationships at high pressure. The grain orientations are well resolved and sufficient for following processes such as plastic deformation or phase transformation. The paper also explores the effect of the indexing parameters and of experimental constraints such as rotation range and step on the validity of the results, setting a basis for optimized experiments.

In situ Hall effect measurement on diamond anvil cell under high pressure

2010 ◽  
Vol 81 (11) ◽  
pp. 115101 ◽  
Author(s):  
Tingjing Hu ◽  
Xiaoyan Cui ◽  
Yang Gao ◽  
Yonghao Han ◽  
Cailong Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Hall Effect ◽  
Diamond Anvil Cell ◽  
Hall Effect Measurement ◽  
Effect Measurement ◽  
Diamond Anvil

scholarly journals Experimental method for in situ determination of material textures at simultaneous high pressure and high temperature by means of radial diffraction in the diamond anvil cell

2009 ◽  
Vol 80 (10) ◽  
pp. 104501 ◽  
Author(s):  
Hanns-Peter Liermann ◽  
Sébastien Merkel ◽  
Lowell Miyagi ◽  
Hans-Rudolf Wenk ◽  
Guoyin Shen ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Experimental Method ◽  
Diamond Anvil Cell ◽  
Diamond Anvil

Growth and High Pressure Investigation of (C60)n@SWNT

2012 ◽  
Vol 442 ◽  
pp. 26-30
Author(s):  
Yong Gang Zou ◽  
Xiao Hui Ma ◽  
Quan Lin Shi ◽  
Guo Jun Liu ◽  
Qing Xue Sui ◽  
...  
Keyword(s):  
High Pressure ◽  
Laser Irradiation ◽  
Diamond Anvil Cell ◽  
Pressure Effects ◽  
Diffusion Method ◽  
Uv Laser ◽  
One Dimensional ◽  
Diamond Anvil ◽  
830 Nm Laser

The (C60)n@SWNT (peapod) samples were prepared by vapor diffusion method. We performed the high pressure Raman measurements on the peapod samples by using a Mao-Bell type diamond anvil cell (DAC). In the In situ high pressure experiments, the peapod samples were exposed under UV laser line irradiation. The polymerization of C60 molecules in SWNT cave under both laser irradiation and pressure effects has been studied. The Raman spectra of the released samples from high pressure indicated that C60s form one-dimensional orthorhombic polymer. For the Raman measurements, two different excitation wavelengths were used, 325 nm laser and 830 nm laser.

An easy to use X-ray collimator for Mao-Bell type diamond anvil cell

2006 ◽  
Vol 21 (4) ◽  
pp. 320-322 ◽  
Author(s):  
P. Ch. Sahu ◽  
N. R. Sanjay Kumar ◽  
N. V. Chandra Shekar ◽  
N. Subramanian
Keyword(s):  
High Pressure ◽  
Diamond Anvil Cell ◽  
Radiation Safety ◽  
Incident Beam ◽  
X Ray Diffraction ◽  
X Ray ◽  
Safety Requirements ◽  
Diamond Anvil ◽  
Special Precaution

An incident beam X-ray collimator for Mao-Bell type diamond anvil cell (DAC) has been developed. Alignment of the collimator is carried out in situ while viewing the image of the collimated X-ray spot formed on a thin layer of fluorescent material spread on the diamond anvil culets with the help of a microscope. Special precaution has been taken to meet the radiation safety requirements during alignment and routine use. This collimator is of immense help for laboratory based high pressure X-ray diffraction experiments.

Phase Transition of Graphitic-C 3 N 4 under High Pressure by In Situ Resistance Measurement in a Diamond Anvil Cell

2005 ◽  
Vol 22 (6) ◽  
pp. 1347-1349 ◽  
Author(s):  
Han Yong-Hao ◽  
Luo Ji-Feng ◽  
Gao Chun-Xiao ◽  
Ma Hong-An ◽  
Hao Ai-Min ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Diamond Anvil Cell ◽  
Resistance Measurement ◽  
Diamond Anvil
Sign in / Sign up

Export Citation Format

Share Document