Results 11 to 20 of about 2,888,981 (203)

High-pressure high-temperature synthesis of NdRe₂. [PDF]

Front Chem
In this study, we report the synthesis of a new cubic neodymium-rhenium metallic alloy NdRe2 through the utilization of high pressure and laser heating in a diamond anvil cell. NdRe2 crystallizes in the Fd3¯m space group with a lattice parameter equal to 7.486 (2) Å and Z = 8 at 24 (1) GPa and 2,200 (100) K.
Hussein Z, Kazemiasl N, Hussaini K, Vaquero L, Barkova O, Drozd V, Chariton S, Prakapenka V, Chuvashova I.   +8 more
europepmc   +4 more sources

Are hydrides under high-pressure-high-temperature superconductors? [PDF]

Natl Sci Rev, 2023
ABSTRACT Contrary to the current consensus, I argue that the existing evidence for high-temperature superconductivity in hydrides under high pressure is not compelling. I suggest that the focus of the field should urgently shift to establish unequivocally experimentally whether or not superconductivity in pressurized hydrides exists ...
Hirsch JE.
europepmc   +5 more sources

NMR probe for high pressure and high temperature [PDF]

Review of Scientific Instruments, 1995
A description is given of a probe which is designed for nuclear magnetic resonance (NMR) experiments at 180 MHz on samples at hydrostatic pressure up to 10 kbar. Temperature control has been designed to allow experiments from room temperature up to 600 K, regulated with an accuracy of 0.1 K.
de Langen, M., Prins, K.O.
openaire   +3 more sources

Quasicrystals at high pressures and temperatures: a review

Rendiconti Lincei. Scienze Fisiche e Naturali, 2023
AbstractWe summarize the results of studies on quasicrystals (QCs) at extreme conditions over the last 4 decades with particular emphasis for compositions falling in the Al-based ternary system as the closest to those of quasicrystals discovered in nature, such as icosahedrite and decagonite.
V. Stagno, L. Bindi
openaire   +2 more sources

High-pressure, high-temperature molecular doping of nanodiamond. [PDF]

Sci Adv, 2019
We create defects for quantum technologies by using high temperatures and pressures to convert molecularly doped carbon to diamond.
Crane MJ, Petrone A, Beck RA, Lim MB, Zhou X, Li X, Stroud RM, Pauzauskie PJ.   +7 more
europepmc   +8 more sources

The Phase Transition and Dehydration in Epsomite under High Temperature and High Pressure

Crystals, 2020
The phase stability of epsomite under a high temperature and high pressure were explored through Raman spectroscopy and electrical conductivity measurements in a diamond anvil cell up to ~623 K and ~12.8 GPa.
Linfei Yang, Lidong Dai, Heping Li, Haiying Hu, Meiling Hong, Xinyu Zhang   +5 more
doaj   +1 more source

Elasticity of diamond at high pressures and temperatures [PDF]

Applied Physics Letters, 2012
We combine density functional theory within the local density approximation, the quasiharmonic approximation, and vibrational density of states to calculate single crystal elastic constants, and bulk and shear moduli of diamond at simultaneous high pressures and temperatures in the ranges of 0–500 GPa and 0–4800 K.
Núñez-Valdez, M., Umemoto, K., Wentzcovitch, R.   +2 more
openaire   +4 more sources

Influence of Saline Fluids on the Electrical Conductivity of Olivine Aggregates at High Temperature and High Pressure and Its Geological Implications

Frontiers in Earth Science, 2021
The electrical conductivities of hydrous olivine (Ol) aggregates and Ol–H2O, Ol–NaCl–H2O (salinity: 1–21 wt%; fluid fraction: 5.1–20.7 vol%), Ol–KCl–H2O (salinity: 5 wt%; fluid fraction: 10.9–14.0 vol%) and Ol–CaCl2–H2O systems (salinity: 5 wt%; fluid ...
Wenqing Sun, Lidong Dai, Lidong Dai, Lidong Dai, Haiying Hu, Haiying Hu, Jianjun Jiang, Jianjun Jiang, Mengqi Wang, Mengqi Wang, Ziming Hu, Ziming Hu, Chenxin Jing, Chenxin Jing   +13 more
doaj   +1 more source

Pressure of the standard model at high temperatures [PDF]

Journal of High Energy Physics, 2006
We compute the pressure of the standard model at high temperatures in the symmetric phase to three loops, or to O(g^5) in all coupling constants. We find that the terms of the perturbative expansion in the SU(2) + Higgs sector decrease monotonically with increasing order, but the large values of the strong coupling constant g_s and the Yukawa coupling ...
Gynther, A., Vepsalainen, M.
openaire   +2 more sources

Transformation of Ammonium Azide at High Pressure and Temperature. [PDF]

Materials (Basel), 2020
The compression of ammonium azide (AA) has been considered to be a promising route for producing high energy-density polynitrogen compounds. So far though, there is no experimental evidence that pure AA can be transformed into polynitrogen materials under high pressure at room temperature.
Zhang G, Zhang H, Ninet S, Zhu H, Beneut K, Liu C, Mezouar M, Gao C, Datchi F.   +8 more
europepmc   +5 more sources