Search Results - "Dubrovinsky, L. S."

Sound Velocity Measurements of B2‐Fe‐Ni‐Si Alloy Under High Pressure by Inelastic X‐Ray Scattering: Implications for the Composition of Earth's Core by Dominijanni, S., McCammon, C. A., Ohtani, E., Ikuta, D., Sakamaki, T., Ishii, T., Criniti, G., Dubrovinsky, L. S., Khandarkhaeva, S., Fedotenko, T., Glazyrin, K., Uchiyama, H., Fukui, H., Baron, A. Q. R.

“…Elastic properties of B2‐Fe0.67Ni0.06Si0.27 (15 wt.% Si) alloy have been investigated by combined high‐resolution inelastic X‐ray scattering and powder X‐ray…”
Get full text

Materials science The hardest known oxide by Dubrovinsky, L. S, Dubrovinskaia, N. A, Swamy, V, Muscat, J, Harrison, N. M, Ahuja, R, Holm, B, Johansson, B

“…A material as hard as diamond or cubic boron nitride has yet to be identified, but here we report the discovery of a cotunnite-structured titanium oxide which…”
Get full text

The hardest known oxide by DUBROVINSKY, L. S, DUBROVINSKAIA, N. A, SWAMY, V, MUSCAT, J, HARRISON, N. M, AHUJA, R, HOLM, B, JOHANSSON, B

“…The authors report the discovery of a cotunnite-structured titanium oxide which represents the hardest oxide known. This is a new polymorph of titanium…”
Get full text

High-Pressure Studies of (Mg0.9Fe0.1)2SiO4 Olivine Using Raman Spectroscopy, X-ray Diffraction, and Mössbauer Spectroscopy by Rouquette, J, Kantor, I, McCammon, C. A, Dmitriev, V, Dubrovinsky, L. S

“…High-pressure studies of (Mg0.9Fe0.1)2SiO4 olivine were performed at ambient temperature using X-ray diffraction, Raman spectroscopy, and Mössbauer…”
Get full text

Consequences of pressure-instigated spin crossover in RFeO3 perovskites; a volume collapse with no symmetry modification by Rozenberg, G. Kh, Pasternak, M. P, Xu, W. M, Dubrovinsky, L. S, Carlson, S, Taylor, R. D

“…High-pressure X-ray diffraction, Mossbauer, and Raman studies in the antiferromagnetic insulators RFeO3 orthorhombic perovskites (R = Pr, Eu, Lu) disclose an…”
Get full text

The stishovite paradox in the evolution of lower mantle magmas and diamond-forming melts (experiment at 24 and 26 GPa) by Litvin, Yu. A., Spivak, A. V., Simonova, D. A., Dubrovinsky, L. S.

“…Experimental studies of phase relations in the oxide–silicate system MgO–FeO–SiO 2 at 24 GPa show that the peritectic reaction of bridgmanite controls the…”
Get full text

Breakdown of Magnetic Order in the Pressurized Kitaev Iridate β−Li2IrO3 by Majumder, M, Manna, R S, Simutis, G, Orain, J C, Dey, T, Freund, F, Jesche, A, Khasanov, R, Biswas, P K, Bykova, E, Dubrovinskaia, N, Dubrovinsky, L S, Yadav, R, Hozoi, L, Nishimoto, S, Tsirlin, A Tsirlin, Gegenwart, P

“…Temperature-pressure phase diagram of the Kitaev hyperhoneycomb iridate β−Li2IrO3 is explored using magnetization, thermal expansion, magnetostriction, and…”
Get full text

Experimental and theoretical identification of a new high-pressure phase of silica by Saxena, S. K, Dubrovinsky, L. S, Lazor, P, Ahuja, R, Eriksson, O, Wills, J. M, Johansson, B

“…Following the discovery of stishovite (the highest-pressure polymorph of silica known from natural samples), many attempts have been made to investigate the…”
Get full text

Experimental and theoretical identification of a new high-pressure TiO2 polymorph by Dubrovinskaia, N A, Dubrovinsky, L S, Ahuja, R, Prokopenko, V B, Dmitriev, V, Weber, H P, Osorio-Guillen, J M, Johansson, B

“…Our combined theoretical and experimental investigations have led to the discovery of a new polymorph of titanium dioxide, where titanium is seven-coordinated…”
Get full text

High pressure induced phase transformation of SiO2 and GeO2: difference and similarity by PRAKAPENKA, V. P, GUOYIN SHEN, DUBROVINSKY, L. S, RIVERS, M. L, SUTTON, S. R

“…Authors report high pressure polymorphism of SiO2 and GeO2 at room and high temperatures. It was found that kinetics has a large effect on pressure induced…”
Get full text

Thermal Expansion of Periclase (MgO) and Tungsten (W) to Melting Temperatures by Dubrovinsky, L. S., Saxena, S. K.

“…In situ x-ray data on molar volumes of periclase and tungsten have been collected over the temperature range from 300 K to melting. We determine the…”
Get full text

Atomistic simulation of the crystal structures and bulk moduli of TiO2 polymorphs by SWAMY, V, GALE, J. D, DUBROVINSKY, L. S

“…The crystal structures and bulk moduli of the known or proposed TiO2 polymorphs (which include the low-pressure forms rutile, anatase, brookite, TiO2(B),…”
Get full text

High-temperature powder x-ray diffraction of yttria to melting point by Swamy, V., Dubrovinskaya, N. A., Dubrovinsky, L. S.

“…Powder x-ray diffraction data of yttria (Y2O3) were obtained from room temperature to melting point with the thin wire resistance heating technique. A…”
Get full text

Stability of Ferropericlase in the Lower Mantle by Dubrovinsky, L. S., Dubrovinskaia, N. A., Saxena, S. K., Annersten, H., Hålenius, E., Harryson, H., Tutti, F., Rekhi, S., Le Bihan, T.

“…We have heated ferropericlases (Mg0.60Fe0.40)O and (Mg0.50Fe0.50)O to temperatures of 1000 kelvin at pressures of 86 gigapascals, simulating the stability of…”
Get full text

Mössbauer spectroscopic study of pressure-induced magnetisation in wüstite (FeO) by Kantor, I.Yu, McCammon, C.A, Dubrovinsky, L.S

“…A room temperature high pressure in situ Mössbauer study of wüstite Fe 0.94O was carried out in a diamond anvil cell under hydrostatic conditions at pressures…”
Get full text

Phase transitions in MnO and FeO at low temperatures: A neutron powder diffraction study by Kantor, A.P., Dubrovinsky, L.S., Dubrovinskaia, N.A., Kantor, I.Yu, Goncharenko, I.N.

“…A powder neutron diffraction study of MnO and Fe 0.92O was conducted at temperatures between 1.5 and 298 K in order to establish the relationship between…”
Get full text

Synchrotron X-Ray Study of Iron at High Pressure and Temperature by Saxena, S. K., Dubrovinsky, L. S., Häggkvist, P., Cerenius, Y., Shen, G., Mao, H. K.

“…X-ray synchrotron experiments with in situ laser heating of iron in a diamond-anvil cell show that the high-pressure ε phase, a hexagonal close-packed (hcp)…”
Get full text

Magnetic and electronic properties of magnetite across the high pressure anomaly by Kozlenko, D. P., Dubrovinsky, L. S., Kichanov, S. E., Lukin, E. V., Cerantola, V., Chumakov, A. I., Savenko, B. N.

“…The magnetite Fe 3 O 4 , being anciently known magnetic material to human kind and remaining in leading positions for development of advanced technologies…”
Get full text

Electronic state of Fe2+ in (Mg,Fe)(Si,Al)O3 perovskite and (Mg,Fe)SiO3 majorite at pressures up to 81 GPa and temperatures up to 800 K by Narygina, Olga V., Kantor, I. Yu, McCammon, C. A., Dubrovinsky, L. S.

“…Despite a large number of studies of iron spin state in silicate perovskite at high pressure and high temperature, there is still disagreement regarding the…”
Get full text

Crystallographic transitions related to high-pressure magnetic and electronic phenomena in Fe-based compounds by Rozenberg, G. Kh, Pasternak, M. P., Xu, W. M., Dubrovinsky, L. S., Hanfland, M.

“…The main purpose of this paper is to address the issue of crystallographic transitions related to magnetic/electronic phenomena in strongly correlated…”
Get full text