Results 251 to 260 of about 119,278 (296)

Phase stabilities of fcc Ti nanocrystals

Solid State Communications, 2004
A model for the equilibrium transition size and temperature between hcp and fcc structure of nanocrystals Ti has been established in terms of the effect of surface stress on the internal pressure of nanocrystals. It was found that as size and temperature decreased, the relative stability of fcc structure in comparison with hcp structure increased.
Z.P. Chen, Z. Wen, Q. Jiang
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Phase transition in type-1 fcc Ising antiferromagnets

Physical Review B, 1989
We have used Monte Carlo simulations to investigate an Ising system on the fcc lattice, with antiferromagnetic first-neighbor interactions (${J}_{1}$) and ferromagnetic second-neighbor interactions (${J}_{2}$) (type-1 antiferromagnet). Our results indicate that the transition remains first order for the ratio ${J}_{2}$/\ensuremath{\Vert}${J}_{1 ...
, Oitmaa, , Fernandez
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FCC → SC phase transition in alkali halides

Solid State Communications, 1980
Abstract The NaCl → CsCl structural pressure transformation is studied using a new interionic potential. The theoretical transition pressures are in good agreement with experiment.
Y.V.G.S. Murti, T.V. Selvarajan
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Gas phase synthesis of fcc-cobalt nanoparticles

Journal of Materials Chemistry, 2006
Air stable cobalt nanoparticles have been prepared continuously at a production rate of 30 g h−1 by a modified flame synthesis method under highly reducing conditions. Nanoparticles of 20–60 nm in diameter consisted of metallic face-centered-cubic cobalt.
Robert N. Grass, Wendelin J. Stark
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Is blue phase II fcc?

Physical Review Letters, 1987
On pense generalement que la phase bleue II (BP II) est une structure cubique simple. On demontre que la BP II dans le (+)p-[p-methoxybenzylidene) amino] cinnamate de methyl-2 butyle est cfc et on montre que c'est probablement vrai pour toutes les autres BP ...
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Stability of fcc phase FeH to 137 GPa

American Mineralogist, 2020
Abstract We examined the crystal structure of FeHX (X~1) (FeH hereafter) at high pressure and temperature by X-ray diffraction up to 137 GPa. Results show that FeH adopts a face-centered cubic (fcc) structure at pressures of 43 to 137 GPa and temperatures of ~1000 to 2000 K.
Chie Kato, Koichiro Umemoto, Kenji Ohta, Shoh Tagawa, Kei Hirose, Yasuo Ohishi   +5 more
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Martensitic phase transformation and lattice dynamics of fcc cobalt

Physical Review B, 1996
The phonon dispersion of the high-temperature fcc phase of pure cobalt has been measured by inelastic neutron scattering at 833 K. Transverse phonon branches were measured above and below the Martensitic hcp-fcc transformation in order to learn about an influence of lattice dynamics, if any.
, Strauss, , Frey, , Petry, , Trampenau, , Nicolaus, , Shapiro, , Bossy   +6 more
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Lattice dynamics of the metastable fcc phase of lanthanum

Physical Review B, 1985
A single crystal of the metastable fcc phase of La was grown of sufficient volume for the study of the lattice dynamics of this phase by coherent inelastic-neutron-scattering techniques. The phonon dispersion curves have been measured along the (xi00), (xixi0), (xixixi), and (0xi1) symmetry directions at room temperature and at 10 K.
, Stassis, , Smith, , Harmon, , Ho, , Chen   +4 more
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Surface first-order phase transitions in fcc Ising ferromagnets

Physical Review Letters, 1987
The critical behavior of (111) surfaces in an fcc Ising ferromagnet is studied by means of the cluster variation method in the tetrahedron approximation. The critical value of the surface interaction ${\mathrm{J}}_{\mathrm{sc}}$ leading to a surface transition temperature larger than in the bulk is equal to 1.778${\mathrm{J}}_{\mathrm{b}}$.
, Sanchez, , Morán-López
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First-order phase transition in the fcc Heisenberg antiferromagnet

Physical Review B, 1989
The nature of the phase transition of the nearest-neighbor Heisenberg antiferromagnet on a fcc lattice is studied by means of Monte Carlo simulations. Using a finite-size scaling, the transition is shown to be unambiguously of first order. Evidence for a first-order transition in the corresponding XY model is also presented.
, Diep, , Kawamura
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