Transport measurements at low temperatures in a diamond anvil cell with helium as pressure medium

1997 ◽  
Vol 68 (3) ◽  
pp. 1514-1517 ◽  
Author(s):  
J. Thomasson ◽  
Y. Dumont ◽  
J.-C. Griveau ◽  
C. Ayache
Keyword(s):  
Low Temperatures ◽  
Diamond Anvil Cell ◽  
Transport Measurements ◽  
Pressure Medium ◽  
Diamond Anvil

New diamond anvil cell for optical and transport measurements under high magnetic fields up to 60 T

2008 ◽  
Vol 28 (4) ◽  
pp. 627-631 ◽  
Author(s):  
Marius Millot ◽  
Sylvie George ◽  
Jean-Marc Broto ◽  
Bernard Couzinet ◽  
Jean-Claude Chervin ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Diamond Anvil Cell ◽  
High Magnetic Fields ◽  
Transport Measurements ◽  
Diamond Anvil

scholarly journals The Structure of Ferroselite, FeSe2, at Pressures up to 46 GPa and Temperatures down to 50 K: A Single-Crystal Micro-Diffraction Analysis

Crystals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 289 ◽  
Author(s):  
Barbara Lavina ◽  
Robert Downs ◽  
Stanislav Sinogeikin
Keyword(s):  
Single Crystal ◽  
Low Temperatures ◽  
Diamond Anvil Cell ◽  
Structural Changes ◽  
High Pressures ◽  
Structural Instability ◽  
Crystal Structure Analysis ◽  
Ambient Conditions ◽  
Diamond Anvil

We conducted an in situ crystal structure analysis of ferroselite at non-ambient conditions. The aim is to provide a solid ground to further the understanding of the properties of this material in a broad range of conditions. Ferroselite, marcasite-type FeSe2, was studied under high pressures up to 46 GPa and low temperatures, down to 50 K using single-crystal microdiffraction techniques. High pressures and low temperatures were generated using a diamond anvil cell and a cryostat respectively. We found no evidences of structural instability in the explored P-T space. The deformation of the orthorhombic lattice is slightly anisotropic. As expected, the compressibility of the Se-Se dumbbell, the longer bond in the structure, is larger than that of the Fe-Se bonds. There are two octahedral Fe-Se bonds, the short bond, with multiplicity two, is slightly more compressible than the long bond, with multiplicity four; as a consequence the octahedral tetragonal compression slightly increases under pressure. We also achieved a robust structural analysis of ferroselite at low temperature in the diamond anvil cell. Structural changes upon temperature decrease are small but qualitatively similar to those produced by pressure.

scholarly journals Effect of Pressure on Arsenic Diffusion in Germanium

1993 ◽  
Vol 325 ◽  
Author(s):  
S. Mitha ◽  
S. D. Theiss ◽  
M. J. Aziz ◽  
D. Schiferl ◽  
D. B. Poker
Keyword(s):  
Diamond Anvil Cell ◽  
Activation Volume ◽  
Secondary Ion Mass Spectrometry ◽  
Liquid Argon ◽  
Temperature Profiles ◽  
Pressure Medium ◽  
Diamond Anvil ◽  
Diffusion Mechanisms ◽  
Secondary Ion ◽  
High Temperature High Pressure

AbstractWe report preliminary results of a study of the activation volume for diffusion of arsenic in germanium. High-temperature high-pressure anneals were performed in a liquid argon pressure medium in a diamond anvil cell capable of reaching 5 GPa and 7500 C, which is externally heated for uniform and repeatable temperature profiles. The broadening of an ion-implanted arsenic profile was measured by Secondary Ion Mass Spectrometry. Hydrostatic pressure retards the diffusivity at 575°C, characterized by an activation volume that is +15% of the atomic volume of Ge. Implications for diffusion mechanisms are discussed.

scholarly journals Laser ultrasonic measurements in a diamond anvil cell on Fe and the KBr pressure medium

2011 ◽  
Vol 278 ◽  
pp. 012017 ◽  
Author(s):  
N Chigarev ◽  
P Zinin ◽  
D Mounier ◽  
A Bulou ◽  
A Zerr ◽  
...  
Keyword(s):  
Diamond Anvil Cell ◽  
Laser Ultrasonic ◽  
Ultrasonic Measurements ◽  
Pressure Medium ◽  
Diamond Anvil

scholarly journals The Structure of Ferroselite, FeSe2, at Pressures Upto 46 GPa and Temperatures Down to 50 K: ASingle-Crystal Micro-Diffraction Analysis

2018 ◽  
Author(s):  
Barbara Lavina ◽  
Robert T Downs ◽  
Stanislav Sinogeikin
Keyword(s):  
Low Temperatures ◽  
Diamond Anvil Cell ◽  
Structural Changes ◽  
High Pressures ◽  
Structural Instability ◽  
Crystal Structure Analysis ◽  
Temperature Decrease ◽  
Ambient Conditions ◽  
Diamond Anvil

We conducted an in-situ crystal structure analysis of ferroselite at non-ambient conditions. The aim is to provide a solid ground to further the understanding of the properties of this material in a broad range of conditions. Ferroselite, marcasite-type FeSe2, was studied under high pressures up to 46 GPa and low temperatures, down to 50 K using single-crystal microdiffraction techniques. High pressure and low temperatures were generated using a diamond anvil cell and a cryostat. We found no evidences of structural instability in the explored P-T space. The deformation of the orthorhombic lattice is slightly anisotropic. As expected, the compressibility of the Se-Se dumbbell, the longer bond in the structure, is larger than that of the Fe-Se bonds. Less obvious is the behavior of the octahedral bonds, the shorter bond is the most compressible determining a small increase in the octahedron distortion with pressure. We also achieved a robust structural analysis of ferroselite at low temperature in the diamond anvil cell. Structural changes upon temperature decrease are small but qualitatively similar to those produced by pressure.

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