Results 171 to 180 of about 4,246,041 (202)

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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Thermal and Elastic Properties of C60 in Fcc Phase

SOP Transactions on Theoretical Physics, 2014
In the present decade, considerable interest has been taken in the investigation of anharmonic properties of materials of various kinds [1, 2]. Many workers have contributed in the field through their experimental and theoretical approach. Several efforts have been made in the study of physical and anharmonic properties of solids of different types [3 ...
Preeti Singh, N. K Gaur
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Phase stability of fcc alloys with the embedded-atom method

Physical Review B, 1990
The heats of solution of disordered phases and several stoichiometric compounds have been determined for 12 binary alloys of fcc metals using an analytic embedded-atom-method model with no adjustable parameters. The cohesive energy, vacancy formation energy, lattice constant, bulk modulus, and average shear modulus for each metal are used as input data,
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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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Phase structure of the FCC quartet Ising model

Physics Letters A, 1982
Abstract The phase structure of an Ising model with four-spin interactions defined on an FCC lattice is determined by Monte Carlo techniques. Our results show that this system undergoes a single, first order transition at the self-dual point. This resolves previous mutually contradictory conclusions which have been drawn about this model.
Francisco C. Alcaraz, Laurence Jacobs, Robert Savit   +2 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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Direct observation of antiferromagnetic phase transition in fcc Fe films

Physical Review B, 1997
Spin-polarized low-energy electron diffraction combined with in situ Kerr magnetometry and a model calculation indicates that a six monolayer thick fcc Fe film undergoes a reversible transition from a room-temperature paramagnetic state to a low-temperature phase including antiferromagnetically coupled planes.
Würsch Ch, Back CH, Bürgi L, Ramsperger U, Vaterlaus A, Maier U, Pescia D bc, Politi P, Pini MG, Rettori A   +9 more
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Uniaxial phase of alkali metals on a fcc (100) metal surface

Physical Review B, 1992
The overlayer phases of alkali metals on a fcc (100) surface are modeled by simple dipole moment interactors on a modulated potential surface.
, Shrimpton, , Welsh, , Song
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Phase stability of carbon in FCC and BCC metals

Calphad, 1988
Abstract The Metal-Carbon interaction parameter was calculated from the binary systems Cr-C, Mn-C, Ni-C, Co-C, V-C, and the ternary systems Cr-Fe-C, Mn-Fe-C, Ni-Fe-C, Co-Fe-C, V-Fe-C, V-Cr-C as was done for Fe-C. In all cases the excess Gibbs energy of mixing can be expressed as Gm,ex = W3(x−x3), where W is the interaction parameter, and x is the ...
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