• Entropy-driven structural transition from Tetragonal to Cubic phase: H" by Tingting Luo, Yihao Hu et al. (unl.edu)
  • Herein, we realize that the modulation of entropy via alloying CdSe achieves the structural transition from tetragonal structure with ordered configuration on cations sites in CuInSe 2 compound to cubic CuCdInSe 3 . (unl.edu)
  • These ridges disappear gradually on heating above the cubic-to-tetragonal phase transition temperature T CT = 523°C, which is also near the temperature at which the dielectric permittivity begins to deviate from Curie-Weiss behavior. (nist.gov)
  • XRD analysis showed phase transitions from cubic - tetragonal - orthorhombic - rhombohedral with increasing synthesis temperature and calculated grain sizes were 34 - 38 nm (using the Scherrer formula). (appropedia.org)
  • High-resolution synchrotron X-ray measurements confirm that there are crystal structure transformations sychronised with the magnetic transitions from paramagnetism to ferrimagnetism (PM-FM) at TC in the x = 0.0 and 0.2 cases with crystal structure changing from cubic (Fd-3 m) to tetragonal (I41/amd), However structures remain cubic (Fd-3 m) for x = 0.4, 0.6, and 1.0. (edu.au)
  • Explicit energy functions are derived for the cubic-to-tetragonal phase transition, where data are fitted for InTl. Another example is given for the cubic-to-monoclinic transition in CuZnAl. (bath.ac.uk)
  • We studied structure and thermodynamic properties of cubic and tetragonal phases of pure uranium and U-Mo alloys using atomistic simulations: molecular dynamics and density functional theory. (hse.ru)
  • The coexisting phases are both body centered cubic (BCC) with different domain spacings, stabilized by partitioning of the salt. (escholarship.org)
  • The AIMD results showed a possible coexistence of a face-centered cubic (fcc) phase and a body-centered cubic (bcc) phase at the room temperature and indicated stabilization of a single fcc phase above 1070 K at the equiatomic composition of AlFeCoNiCu. (mst.edu)
  • The first one is from liquid state to metastable (transitional) body-centered cubic (bcc) phase. (bvsalud.org)
  • We find that doping NBT with 5.6% BaTiO 3 , a composition close to the morphotropic phase boundary with enhanced piezoelectric properties, increases the room temperature correlation length along from 40 Å to 60 Å while doubling the associated integrated diffuse scattering. (nist.gov)
  • The transformation temperature for changing phase is 882°C. (eternaltools.com)
  • 395 K). These structural phase transitions arise because of the disorderly motion of Cu atoms as the temperature increases. (kjmm.org)
  • DyCo2Mnx (x = 0.0, 0.2, 0.4, 0.6, and 1.0) compounds were synthesised and found to all be single-phase, isostructural to DyCo2 (MgCu2 Laves phase cubic structure (Fd-3 m) at room temperature). (edu.au)
  • DyCo2Mn exhibits a huge coercivity field HC = 21,170 Oe at 5 K. The magnetic transition at Curie temperature TC, was observed as first order for DyCo2 but second order for the Mn doped compounds. (edu.au)
  • The calculated phase diagrams showed formation of the same two phases at the room temperature, and a phase transformation at about 1010 K to form a single fcc phase. (mst.edu)
  • High temperature XRD (HTXRD) analysis showed a significant increase in weight fraction of the fcc phase at high temperatures confirming the predicted phase transformation. (mst.edu)
  • The phase diagram (external field, temperature) is derived and the influence of cubic anharmonicity on the form of the phase diagram and location of the critical point is studied. (lviv.ua)
  • The first order phase transition, occuring as the external field varies as well as the temperature, is studied. (lviv.ua)
  • The main attention was paid to the metastable g0-phase that is formed in U-Mo alloys at low temperature. (hse.ru)
  • Reentrant phase behavior and coexistence in asymmetric block copolymer electrolytes. (escholarship.org)
  • The crystal structure of a new crystalline phase of isobutyl-6-amino-5-cyano-2-methyl-4-phenyl-4 H -pyran-3-carboxylate was accurately determined by single-crystal X-ray diffraction analysis. (iucr.org)
  • The phase transitions were characterized by heat capacity measurements, Rietveld refinements, and pair distribution function (PDF) analysis of the diffraction data to achieve information on the phase transition temperatures and order as well as structural changes on the local level and the long range. (tu-darmstadt.de)
  • 846 K. The phase transition at T = 592 K (diffraction)/606 K (thermal analysis) was reversible with a very small thermal hysteresis of about 2 K. The local structure at 100 K was composed of a complex nanodomain arrangement of Amm2- and Pbnm-like local structures with different coherence lengths. (tu-darmstadt.de)
  • Here, I discuss how we - myself, my laboratory and the diffraction community - have faced the phase problem, considering the evolution of methods for phase evaluation as structural biology developed to the present day. (iucr.org)
  • however, experimental phasing remained essential for molecules without obvious precedents, with multi- and single-wavelength anomalous diffraction (MAD and SAD) predominating. (iucr.org)
  • For complicated structures, such as those of biological macromolecules, suitable initial models are built to fit electron-density distributions from Fourier syntheses, which require phase angles as well as the diffraction amplitudes. (iucr.org)
  • All samples contained only a cubic skinnerite phase, as evidenced by X-ray diffraction. (kjmm.org)
  • The 16 at% Sc concentration and e ⁄ a =2.10, as well as the intensity profile of the measured X-ray diffraction spectrum, indicate that this i-phase can be classified into the Tsai-type: the Tsai-type i-phases found so far commonly contain an element having relatively large atomic size with 15-16 at% and have e/a within the range 2.0-2.15. (go.jp)
  • The characterization experiments utilizing scanning electron microscopy (SEM), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD) confirmed the crystal structures and composition of phases determined by AIMD simulations and phase diagram calculations. (mst.edu)
  • We have demonstrated by x-ray diffraction that fluid-fluid phase separation in ternary DOPC / DPPC / cholesterol mixtures can be induced in bulk phases by hydrostatic pressure. (lu.se)
  • By incorporation of charged phospholipids, we have been able to swell inverse bicontinuous cubic phases to approx. (lu.se)
  • Furthermore, while the Neel state is perfectly space-time symmetric, the competing phase shows significant deviations from this symmetry. (aps.org)
  • Moreover, Monte Carlo simulations predict a first-order quantum phase transition from a homogeneous superfluid phase to the quantum droplet phase with face-centered cubic symmetry for Rydberg-dressed bosons. (aps.org)
  • Here, we study the interaction of gold nanoparticles (NPs) of different shapes (nanospheres and nanorods) with biomimetic membranes of different morphology, i.e. flat membranes (2D symmetry, representative of the most common plasma membrane geometry), and cubic membranes (3D symmetry, representative of non-lamellar membranes, found in Nature under certain biological. (lu.se)
  • These alloys exhibit a solid-state phase transition from a layered rhombohedral structure to a cubic rocksalt structure at intermediate temperatures. (programmaster.org)
  • The determination of reversible phase transitions in the perovskite-type thermoelectric oxide Eu0.8Ca0.2TiO3-δ is fundamental, since structural changes largely affect the thermal and electrical transport properties. (tu-darmstadt.de)
  • The XRD analyses showed that the samples were single phases with apparently pseudo cubic perovskite structure. (bnc.hu)
  • We argue that the boundary term induces a ``condensation transition,'' which is closely related to condensation transitions between gapped two-dimensional topological phases. (aps.org)
  • Now, researchers at the Georgia Institute of Technology and Oak Ridge National Laboratory (ORNL) in the USA have developed a new non-destructive technique for investigating phase transitions using the acoustic response at the nanoscale detected with an electrically conductive atomic force microscope (AFM) probe could lead to novel ferroelectric materials. (materialstoday.com)
  • External stimuli can trigger a phase transition in various ferroelectric materials, such as lead magnesium niobite-lead titans, commonly known as PMN-PT, and used in high-resolution ultrasound transducers and pyroelectric devices (infrared detectors). (materialstoday.com)
  • In order to build a complete picture, the team also modeled the relaxor-ferroelectric materials using computational thermodynamic methods and demonstrated that these corroborated the experimental results revealing the existence of a phase transition and the evolution of a complex domain pattern. (materialstoday.com)
  • We would now like to use this method to probe a wide range of phase transition-related phenomena in ferroelectric systems,' Bassiri-Gharb told Materials Today . (materialstoday.com)
  • This is, for example, of paramount importance in ferroelectric thin films, where the presence of a phase transition and the accompanying large enhancement in the piezoelectric response is key in processing smaller and smaller piezoelectric micro- and nano-electromechanical systems. (materialstoday.com)
  • different meta-stable (ferroelectric) phases of undoped BaTiO 3 nanopowders can be stabilized by the sol-hydrothermal method. (appropedia.org)
  • We have also studied the structure of this phase by contrast variation neutron scattering, and showed that the more weakly amphiphilic diacylglycerol component is preferentially located in the smaller, more highly curved inverse micelles. (lu.se)
  • SAN DIEGO (July 6, 2016) - Ware Malcomb, an award-winning international design firm, today announced the completion of the first phase of construction on Cubic Corporation's new office design. (waremalcomb.com)
  • It is found that there are two phase transitions in all simulation processes. (bvsalud.org)
  • The phase diagrams of AlFeCoNiCu system were calculated using a modified thermodynamic approach based on CALPHAD and Muggianu's methods. (mst.edu)
  • We attribute this to the gradual diffusion of the vacancies preceding the phase transition from a layered compound to a cubic structure and we expect such stiffening is a general feature of all (GeTe) m Sb 2 Te 3 and (GeTe) m Bi 2 Te 3 alloys, playing a fundamental role in the thermal conductivity in this important class of thermoelectric materials. (programmaster.org)
  • Investigating Phase Formations in Cast AlFeCoNiCu High Entropy Alloys " by M. Beyramali Kivy, Mohsen Asle Zaeem et al. (mst.edu)
  • Selection and thermal stability of phases are important in design of high entropy alloys (HEA). (mst.edu)
  • Investigating Phase Formations in Cast AlFeCoNiCu High Entropy Alloys by Combination of Computational Modeling and Experiments," Materials and Design , vol. 127, pp. 224 - 232, Elsevier Ltd., Aug 2017. (mst.edu)
  • Hormann, K & Zimmer, J 2007, ' On Landau theory and symmetric energy landscapes for phase transitions ', Journal of the Mechanics and Physics of Solids , vol. 55, no. 7, pp. 1385-1409. (bath.ac.uk)
  • Optical phase change materials (O-PCMs), a unique group of materials featuring exceptional optical property contrast upon a solid-state phase transition, have found widespread adoption in photonic applications such as switches, routers and reconfigurable meta-optics. (nature.com)
  • When optical phase change materials (O-PCMs) undergo solid-state phase transition, their optical properties are significantly altered. (nature.com)
  • We've had very good techniques for characterizing these phase changes at the large scale, and we've been able to use electron microscopy to figure out almost atomistically where the phase transition occurs, but until this technique was developed, we had nothing in between,' adds Bassiri-Gharb. (materialstoday.com)
  • The coexisting phases formed at intermediate salt concentration, elucidated by electron tomography, showed the absence of macroscopic regions with distinct BCC lattices. (escholarship.org)
  • His particular interest is the study of mechanisms of switching domains and its fundamental speed limits, understanding novel emergent states in equilibrium and in the time domain (excited state) and how ultrafast structural electronic and magnetic phase transitions can occur. (psi.ch)
  • Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition. (mpg.de)
  • Superconducting phases and quantum criticality in CeCu 2 Si 2 . (mpg.de)
  • Within the effective-field theory with correlations (EFT), a transverse random field spin-1 Ising model on the simple cubic (z=6) lattice is studied. (ijnnonline.net)
  • Magnetic Properties and Phase Transitions in a Spin-1 Random Transverse Ising Model on Simple Cubic Lattice', International Journal of Nanoscience and Nanotechnology , 7(4), pp. 161-166. (ijnnonline.net)
  • x≤0.25) transition metal oxide system. (bnc.hu)
  • The poor amorphous phase stability of GST mandates a high cooling rate in the order of 10 10 °C/s to ensure complete re-amorphization during melt quenching 39 , which coupled with their low thermal conductivity 40 stipulates a film thickness of around 100 nm or less. (nature.com)
  • The overall analysis indicates that the hydrothermal conditions create a gentle environment to promote the formation of crystalline phase directly from amorphous phase at the very low processing temperatures investigated. (appropedia.org)
  • Since in Eu0.8Ca0.2TiO3-δ the amount of Pbnm domains was too small to percolate, the competition of ferroelectrically distorted octahedra (Amm2 as in BaTiO3) and rigid, tilted octahedra (Pbnm as in CaTiO3) resulted in a cubic long-range structure at low temperatures. (tu-darmstadt.de)
  • Ab-initio molecular dynamics (AIMD) simulations were used to determine crystal structures of phases at different temperatures in equiatomic composition of AlFeCoNiCu. (mst.edu)
  • Hexagonal-phase NaYF4:Yb3+,Er3+ up-conversion nanocrystals (UCNCs) are synthesized by a combination of refluxing and hydrothermal treatment. (edu.hk)
  • This strategy leads to only a slight increase in particle size, from 4.5 to ca. 10 nm, during the cubic-to-hexagonal phase transition. (edu.hk)
  • Further analyses reveal that the final solid at 273 K can be a mixture of hexagonal close-packed (hcp) and face-centered cubic (fcc) microstructures with various proportions of the two, and the slower the cooling rate is, the higher proportion the fcc structure occupies. (bvsalud.org)
  • The phase diagrams, the behavior of critical points, transverse magnetization, internal energy, magnetic specific heat are obtained numerically and discussed for different values of p the concentration of the random transverse field. (ijnnonline.net)
  • Thus, we have the phase problem as a central complication, both intellectually for the field and practically so for many analyses. (iucr.org)
  • In addition, Confocal Laser Scanning Microscopy analyses highlighted that NPs interact with cubic and lamellar phases according to two distinct mechanisms, related to the different structures of the lipid assemblies. (lu.se)
  • This entropy driven order-disorder transition on the cation site, in conjunction with the intensified point defect phonon scattering via alloying CdSe in CuInSe 2 , dramatically suppress the thermal conductivity. (unl.edu)
  • To influence the structure of these materials through chemical or other means, we really need to know where the transition breaks down, and at what length scale that occurs. (materialstoday.com)
  • We studied the effect of hydrostatic pressure on the structure and stability of the inverse micellar cubic phase Fd3m, and have discovered a number of novel effects. (lu.se)
  • We discovered a lyotropic phase of space group P63/mmc, whose structure is based upon an hcp packing of quasi-spherical inverse micelles, in a hydrated mixture of DOPC, dioleoyl glycerol, and cholesterol. (lu.se)
  • abstract = "The aim of this presentation is the development of a general approach for modelling the global complex energy landscapes of phase transitions. (bath.ac.uk)
  • An icosahedral quasicrystal (i-phase) and its 1/1 crystal approximant (1/1-phase) have been found to form in Al-Pd-Sc system. (go.jp)
  • However, the dependence of domain spacing on salt concentration was distinctly non-monotonic, and similar to that of the sample with the reentrant phase behavior. (escholarship.org)
  • We have studied the effects of pressure on the gel-fluid transition in sphingomyelin bilayer membranes, and have found that the ordering of the chains and the development of the ripples on forming the gel phase occur on different timescales. (lu.se)
  • Currently, molecular replacement with AlphaFold models often obviates the need for experimental phase evaluation. (iucr.org)
  • This study validates the Ostwald's step rule and provides evidence for the prediction that the metastable bcc phase forms first from liquid. (bvsalud.org)
  • Using Kouvel-Fisher plot, critical isotherm analysis and Arrott-Noaks plot techniques, a detailed critical exponents analysis was carried out on these transitions: critical exponents β ≈ 0.5, γ ≈ 1.0, and δ ≈ 3.0 were derived indicating that all the second-order transitions belong exhibit long-range magnetic interactions during the magnetic transitions. (edu.au)
  • In 2003, U.S. manufacturers of wood preservatives containing arsenic began a voluntary transition from CCA to other wood preservatives that do not contain arsenic in wood products for certain residential uses, such as play structures, picnic tables, decks, fencing, and boardwalks. (cdc.gov)
  • Specifically for relaxor-ferroelectrics, it had been assumed that localized pockets of material in a different phase than the bulk exist and endow the material with its particular characteristics. (materialstoday.com)
  • We reveal the formation of amorphous complexes via an en masse pathway and their relaxation into virions via a synchronous pathway. (cea.fr)
  • In this work, we show that the addition of salt to a disordered asymmetric block copolymer first leads to the formation of coexisting ordered phases which give way to a reentrant disordered phase at a higher salt concentration. (escholarship.org)
  • The formation areas of the i-phase and the 1/1-phase are limited to very small areas around the compositions of Al 54 Pd 30 Sc 16 and Al 56 Pd 29 Sc 15 , respectively. (go.jp)
  • Transition metals are unique, because they can bond with other elements using not just their outermost shell of electrons (the negatively charged particles that whirl around the nucleus of an atom ), but also the outermost two shells. (livescience.com)
  • This happens because the large number of electrons in transition metals interferes with the usual orderly sorting of electrons into shells around the nucleus. (livescience.com)
  • By means of several analysis methods, the competitions and transitions between microstructures during the cooling processes have been analyzed intensively. (bvsalud.org)
  • A comprehensive research on new DyCo2Mnx (x = 0.0-1.0) Laves phases" by Chun Sheng Fang, Jian Li Wang et al. (edu.au)
  • In addition, JDHXD facilitated the M1-to-M2 transition of microglia in order to minimize neuroinflammation and improve anti-inflammatory repair. (bvsalud.org)