Testing the performance of secondary anvils shaped with focused ion beam from the single-crystal diamond for use in double-stage diamond anvil cells

Khandarkhaeva, Saiana; Fedotenko, Timofey; Krupp, Alena; Glazyrin, Konstantin; Dong, Wen‐Kui; Liermann, Hanns‐Peter; Bykov, Maxim; Kurnosov, Alexander; Dubrovinsky, Leonid

doi:10.1063/5.0071786

Cited by 3 publications

(1 citation statement)

References 45 publications

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“…This is actually a method that is widely used on large volume WC anvils [64]. The shape of the toroidal anvil has some similarities to the ds-DAC, as mentioned in the work of Dewaele et al and Khandarkhaeva et al tested several FIB machined toroidal anvils as second-stage anvils for the ds-DAC and concluded that the toroidal anvil showed greater stability in the assembly and more uniform pressure distribution in the sample cavity [65]. This result highlights the role of the T-DAC toroidal shape at high pressure and confirms its positive contribution.…”

Section: T-dacmentioning

confidence: 97%

Frontier in the diamond anvil cell techniques for ultrahigh pressure generation

Ding

Sun

Jiang

et al. 2023

J. Phys.: Condens. Matter

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The diamond anvil cell (DAC) has become a principal tool for high-pressure research in muti-fields such as physics, earth, and planetary sciences, because of its ability to the realization of megabar pressures and thousands of degrees. Nevertheless, the strain on the culet of single crystal diamond (SCD) at high loads leads to the conventional DAC having a 400 GPa limit. To date, based on the conventional DAC, several new designs were innovatively proposed such as the double stage DAC (ds-DAC) and toroidal DAC (T-DAC). They are both capable to reach pressures above 600 GPa, and even static pressures of more than 1.0 TPa are achieved using ds-DAC. All these progress promote research to explore the new structures and unique properties of matters in a remarkable extended pressure range. Here, the characteristics and experimental methods of these interesting and important ultrahigh pressure technologies are reviewed, the strengths and limitations are summarized, and an outlook on the development of ultrahigh pressure technology is also provided. These exciting results will further stimulate the breakthrough discoveries for ultrahigh pressure studies.

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Section: T-dacmentioning

confidence: 97%

Frontier in the diamond anvil cell techniques for ultrahigh pressure generation

Ding

Sun

Jiang

et al. 2023

J. Phys.: Condens. Matter

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Exploring toroidal anvil profiles for larger sample volumes above 4 Mbar

Zurkowski,

Yang,

Miozzi

et al. 2024

Sci Rep

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With the advent of toroidal and double-stage diamond anvil cells (DACs), pressures between 4 and 10 Mbar can be achieved under static compression, however, the ability to explore diverse sample assemblies is limited on these micron-scale anvils. Adapting the toroidal DAC to support larger sample volumes offers expanded capabilities in physics, chemistry, and planetary science: including, characterizing materials in soft pressure media to multi-megabar pressures, synthesizing novel phases, and probing planetary assemblages at the interior pressures and temperatures of super-Earths and sub-Neptunes. Here we have continued the exploration of larger toroidal DAC profiles by iteratively testing various torus and shoulder depths with central culet diameters in the 30–50 µm range. We present a 30 µm culet profile that reached a maximum pressure of 414(1) GPa based on a Pt scale. The 300 K equations of state fit to our P–V data collected on gold and rhenium are compatible with extrapolated hydrostatic equations of state within 1% up to 4 Mbar. This work validates the performance of these large-culet toroidal anvils to > 4 Mbar and provides a promising foundation to develop toroidal DACs for diverse sample loading and laser heating.

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Ab initio calculations of structural stability, thermodynamic and elastic properties of Ni, Pd, Rh, and Ir at high pressures

Smirnov

2023

Journal of Applied Physics

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This paper presents results of a comprehensive study from first principles into the properties of Ni, Pd, Rh, and Ir crystals under pressure. We calculated elastic constants, phonon spectra, isotherms, Hugoniots, sound velocities, relative structural stability, and phase diagrams. It is shown that in nickel and palladium under high pressures (>0.14 TPa) and temperatures (>4 kK), the body-centered cubic structure is thermodynamically most stable than of the face-centered cubic one. Calculated results suggest that nickel under Earth-core conditions (P∼0.3 TPa, T∼6 kK) have a bcc structure. No structural changes were found to occur in Rh and Ir under pressures to 1 TPa at least. This paper also provides estimations for the pressure and temperature at which the metals of interest begin to melt under shock compression.

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Testing the performance of secondary anvils shaped with focused ion beam from the single-crystal diamond for use in double-stage diamond anvil cells

Cited by 3 publications

References 45 publications

Frontier in the diamond anvil cell techniques for ultrahigh pressure generation

Frontier in the diamond anvil cell techniques for ultrahigh pressure generation

Exploring toroidal anvil profiles for larger sample volumes above 4 Mbar

Ab initio calculations of structural stability, thermodynamic and elastic properties of Ni, Pd, Rh, and Ir at high pressures

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