‘‘Phase diagram’’ of the vortex-solid phase in Y-Ba-Cu-O crystals: A crossover from single-vortex (1D) to collective (3D) pinning regimes

1992 ◽  
Vol 69 (15) ◽  
pp. 2280-2283 ◽  
Author(s):  
L. Krusin-Elbaum ◽  
L. Civale ◽  
V. M. Vinokur ◽  
F. Holtzberg
Keyword(s):  
Phase Diagram ◽  
Solid Phase ◽  
Single Vortex

scholarly journals Thermodynamic Study of Tl6SBr4 Compound and Some Regularities in Thermodynamic Properties of Thallium Chalcohalides

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Dunya Mahammad Babanly ◽  
Qorkhmaz Mansur Huseynov ◽  
Ziya Saxaveddin Aliev ◽  
Dilgam Babir Tagiyev ◽  
Mahammad Baba Babanly
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Chemical Bonding ◽  
Electromotive Force ◽  
Solid Phase ◽  
Thermodynamic Study ◽  
Degree Of Ionization ◽  
Emf Measurements ◽  
Concentration Cells

The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.

scholarly journals Liquid-solid Phase Diagram of (+) and (−) 5-Decanolide

Nature ◽  
1965 ◽  
Vol 206 (4979) ◽  
pp. 85-85 ◽  
Author(s):  
J. H. M. REK
Keyword(s):  
Phase Diagram ◽  
Solid Phase

CF4: Crystal Structure and Solid Phase Diagram with Ar

1969 ◽  
Vol 51 (10) ◽  
pp. 4583-4586 ◽  
Author(s):  
Sandra C. Greer ◽  
Lothar Meyer
Keyword(s):  
Crystal Structure ◽  
Phase Diagram ◽  
Solid Phase

Phase diagram of the system CaSO4—K2SO4—KNO3—Ca(NO3)2—H2O

2014 ◽  
Vol 7 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Jana Jurišová ◽  
Vladimír Danielik ◽  
Pavel Fellner ◽  
Marek Lencsés ◽  
Milan Králik
Keyword(s):  
Phase Diagram ◽  
Quantitative Determination ◽  
Solid Phase ◽  
Calcium Nitrate ◽  
Primary Crystallization ◽  
Potassium Nitrate ◽  
Molar Ratio ◽  
Calcium Cations ◽  
Lower Ratio

Abstract Potassium nitrate as a fertilizer suitable for greenhouse and hydroponic applications can be prepared by the reaction of potassium sulphate with calcium nitrate. However, it may happen that simultaneously with the precipitation of gypsum (CaSO4·2H2O) also two other binary salts, viz. syngenite (K2SO4·CaSO4·H2O) and görgeyite (K2SO4·5CaSO4·H2O) can crystallize. This would lower the yield of KNO3. For minimization of potassium loss we have to determine the conditions under which syngenite and görgeyite crystallize. As a useful tool for the quantitative determination of specific hydrates, simultaneous DTA/TG technique appeared. Each hydrate decomposes at a certain temperature. The loss of water at dehydration can be used for a quantitative determination of the amount of the hydrate in the precipitating solid phase. Based on the experimental data several conclusions can be drawn: (i) excess of calcium cations lowers the concentration of sulphate ions in the liquid phase together with lowering of contents of syngenite and görgeyite in the solid phase; (ii) higher content of water results in a higher solubility of sulphate ions; (iii) joint crystallization of syngenite and gypsum occurs in the composition area interesting from the point of KNO3 production; (iv) area of the primary crystallization of görgeyite does not exist in the phase diagram at 80 °C. However, görgeyite crystallizes at the molar ratio Ca(NO3)2:K2SO4 = 1:1 by ternary crystallization; (v) area of crystallization of pure gypsum is shifted to lower ratio Ca(NO3)2:K2SO4 by the addition of water to the system.

Metastable Phase Equilibria in the Aqueous Ternary System Containing Potassium, Lithium and Chloride Ions at 298.15 K

2011 ◽  
Vol 233-235 ◽  
pp. 1619-1622 ◽  
Author(s):  
Ying Zeng ◽  
Xu Dong Yu ◽  
Jing Qiang Zhang ◽  
Long Gang Li
Keyword(s):  
Phase Diagram ◽  
Ternary System ◽  
Solid Phase ◽  
Metastable Phase ◽  
Equilibrium Phase ◽  
Chloride Ions ◽  
Crystallization Field ◽  
Metastable Equilibrium ◽  
Eutectic Type ◽  
Salting Out

The metastable phase equilibrium in the ternary system containing potassium, lithium and chloride ions was studied at 298.15 K using an isothermal evaporation method. The solubility, density and refractive index of the equilibrated solution were measured. The crystalloid forms of the solid phase were determined using a schreinermarks wet residue method. On the basis of the experimental data, the metastable equilibrium phase diagram and the physicochemical properties vs composition in the ternary system at 298.15 K were plotted. The experimental results show that this system is of a simple eutectic type system, no double salt or solid solution formed at 298.15 K. The phase diagram consists of one invariant point, two uninvariant curves, and two crystallization regions. The crystallization regions correspond to potassium chloride (KCl) and lithium chloride monohydrate (LiCl·H2O), respectively. Salt KCl has the largest crystallization field, whereas salt LiCl·H2O has the smallest crystallization field. Salt LiCl has strong salting-out effect on salt KCl.

Variety of iron silicides grown on Si(001) surfaces by solid phase epitaxy: Schematic phase diagram

2007 ◽  
Vol 601 (22) ◽  
pp. 5088-5092 ◽  
Author(s):  
H. Nakano ◽  
K. Maetani ◽  
K. Hattori ◽  
H. Daimon
Keyword(s):  
Phase Diagram ◽  
Solid Phase ◽  
Solid Phase Epitaxy ◽  
Iron Silicides ◽  
Schematic Phase Diagram

QUANTUM SUPERCONDUCTING FLUCTUATIONS AND DISSIPATION IN VORTEX STATES

1996 ◽  
Vol 10 (06) ◽  
pp. 601-634 ◽  
Author(s):  
RYUSUKE IKEDA
Keyword(s):  
Phase Diagram ◽  
Vortex Flow ◽  
Mean Field ◽  
Feynman Graph ◽  
Transition Line ◽  
Single Vortex ◽  
Ginzburg Landau ◽  
Vortex States ◽  
Resistance Curves ◽  
Superconducting Fluctuations

Quantum effects on renormalized superconducting fluctuations are studied in the context of vortex states. It is argued by taking account of existing resistivity data that inclusion of dissipative (metallic) dynamics is indispensable at any nonzero temperature. Analysis is largely based on simple extensions of the usual time-dependent Ginzburg–Landau (TDGL) dynamics to quantum regime. First, phase diagram and dc conductivities resulting from a quantum GL action with purely dissipative dynamics are investigated, and it is noticed that, on (or, in the vicinity of) the transition line between the vortex lattice and the resulting quantum vortex liquid regime, the inverse of vortex flow conductance becomes a nearly universal value of the order of R q = 6.45 ( k Ω) and independent of material parameters. On the other hands, based on the usual Feynman graph analysis of Kubo formula, the superconducing (i.e. fluctuation) contribution to dc diagonal conductance decreases upon cooling in the disordered phase affected by quantum fluctuations, and becomes zero in T = 0 liquid regime [and above Hc2 (0)] irrespective of the details of dynamics. Reflecting these theoretical results, calculated resistance curves show the behavior quite similar to those observed in homogeneously disordered thin films, even though the presence of a field-tuned insulator–superconductor transition at T = 0 is neglected and the dynamics is purely dissipative. Phenomena in systems with quantum fluctuation of moderate strength are also considered. Analysis is also extended to the cases with other dynamical terms. It is pointed out that the usual (mean field) vortex flow Hall conductivity is never found in any nondissipative T = 0 liquid regime, and argued that, in general, the superconducting Hall effect itself is absent there at low enough fields irrespective of the presence of particle–hole assymmetry. Therefore, in contrast to the thermal vortex states with no pinning disorder, the dc transport phenomena at T = 0 are quite sensitive to the corresponding phase diagram, and hence, discussions based on the single vortex dynamics are even qualitatively invalid in the liquid regime at extremely low temperatures.

scholarly journals Melting upon cooling and freezing upon heating: fluid–solid phase diagram for Švejk–Hašek model of dimerizing hard spheres

Soft Matter ◽  
2017 ◽  
Vol 13 (6) ◽  
pp. 1156-1160 ◽  
Author(s):  
Yurij V. Kalyuzhnyi ◽  
Andrej Jamnik ◽  
Peter T. Cummings
Keyword(s):  
Phase Diagram ◽  
Solid Phase ◽  
Hard Spheres
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