Landau free energy form at the F point of the R3̄c structure

1981 ◽  
Vol 74 (4) ◽  
pp. 2518-2522 ◽  
Author(s):  
Dorian M. Hatch ◽  
D. L. Decker
Keyword(s):  
Free Energy ◽  
Landau Free Energy

scholarly journals Homogenization of composite ferromagnetic materials

2015 ◽  
Vol 471 (2182) ◽  
pp. 20150365 ◽  
Author(s):  
François Alouges ◽  
Giovanni Di Fratta
Keyword(s):  
Free Energy ◽  
Ferromagnetic Material ◽  
Energy Functional ◽  
Ferromagnetic Materials ◽  
Rigorous Derivation ◽  
Free Energy Functional ◽  
Landau Free Energy ◽  
Ferromagnetic Body ◽  
The Media

The objective of this paper is to perform, by means of Γ - convergence and two-scale convergence , a rigorous derivation of the homogenized Gibbs–Landau free energy functional associated with a composite periodic ferromagnetic material, i.e. a ferromagnetic material in which the heterogeneities are periodically distributed inside the media. We thus describe the Γ -limit of the Gibbs–Landau free energy functional, as the period over which the heterogeneities are distributed inside the ferromagnetic body shrinks to zero.

scholarly journals Fluctuations and phase transitions of uniaxial and biaxial liquid crystals using a theoretically informed Monte Carlo and a Landau free energy density

2019 ◽  
Vol 31 (17) ◽  
pp. 175101
Author(s):  
Stiven Villada-Gil ◽  
Viviana Palacio-Betancur ◽  
Julio C Armas-Pérez ◽  
Juan J de Pablo ◽  
Juan P Hernández-Ortiz
Keyword(s):  
Monte Carlo ◽  
Free Energy ◽  
Phase Transitions ◽  
Liquid Crystals ◽  
Energy Density ◽  
Free Energy Density ◽  
Landau Free Energy ◽  
Biaxial Liquid Crystals

LANDAU FREE ENERGY FUNCTIONAL FOR BIPOLARONIC SUPERCONDUCTOR

1988 ◽  
Vol 02 (05) ◽  
pp. 847-850
Author(s):  
T. K. KOPEĆ
Keyword(s):  
Free Energy ◽  
Energy Functional ◽  
Order Parameters ◽  
Free Energy Functional ◽  
Landau Free Energy ◽  
Competing Order

The Landau free energy functional with two competing order parameters is derived from microscopic considerations for bipolaronic superconductor.

scholarly journals Effect of intensity and size of defect on Ginzburg-Landau free energy for type II superconductors

2020 ◽  
Author(s):  
Dyah Eka Puspitasari ◽  
Nizar Rahmanda Hardiyanto ◽  
Eny Latifah ◽  
Hari Wisodo
Keyword(s):  
Free Energy ◽  
Type Ii ◽  
Ginzburg Landau ◽  
Type Ii Superconductors ◽  
Landau Free Energy

Improper incommensurate phases: Nonanalytic landau free energy

1989 ◽  
Vol 95 (1) ◽  
pp. 79-85
Author(s):  
A. P. Levanyuk ◽  
S. A. Minyukov ◽  
P. Toledano ◽  
T. A. Aslanyan
Keyword(s):  
Free Energy ◽  
Landau Free Energy ◽  
Incommensurate Phases

Precursor Nanoscale Textures in Ferroelastics: Interplay between Anisotropy and Disorder

2013 ◽  
Vol 738-739 ◽  
pp. 155-159 ◽  
Author(s):  
Teresa Castán ◽  
Antoni Planes ◽  
Avadh Saxena
Keyword(s):  
Experimental Data ◽  
Free Energy ◽  
Ginzburg Landau ◽  
Landau Free Energy ◽  
Frozen State ◽  
Nanoscale Textures

We study the effect of anisotropy and disorder on the morphology of precursor microstructures within a Ginzburg-Landau free energy framework. In addition, with increasing disorder at low anisotropy we find a crossover from a twinned state to a non-transforming frozen state. Results are compared with available experimental data.

ROLE OF QUASIPROJECTILE ISOSPIN ASYMMETRY IN NUCLEAR FRAGMENTATION

2012 ◽  
Vol 21 (03) ◽  
pp. 1250019 ◽  
Author(s):  
R. TRIPATHI ◽  
A. BONASERA ◽  
S. WUENSCHEL ◽  
L. W. MAY ◽  
Z. KOHLEY ◽  
...  
Keyword(s):  
Free Energy ◽  
Excitation Energy ◽  
Systematic Change ◽  
Yield Data ◽  
Isospin Asymmetry ◽  
Energy Data ◽  
Landau Free Energy ◽  
First Order Phase Transition ◽  
First Order Phase

Fragment yield data, selected with different values of the isospin asymmetry of the quasiprojectile from 78, 86 Kr +58, 64 Ni reactions at E lab = 35 MeV/nucleon, have been analyzed within the framework of Landau free energy approach. Fits to the free energy data indicated the system to be in the regime of a first-order phase transition. The plot of free energy versus isospin asymmetry of the fragments showed a systematic change with increasing isospin asymmetry of the fragmenting source. This observation demonstrated the role of quasiprojectile isospin asymmetry as an external field which governed the minima positions in the free energy plot. The position of the central minimum was found to be in close agreement with the average isospin asymmetry of the fragments calculated excluding neutrons and protons. Significant deviations from the free energy plot were observed for N = Z fragments, particularly for the lighter ones, which could be corrected after inclusion of odd–even effects in the analysis. Analysis of yield data of N = Z nuclei gave a reasonable estimate of temperature. Analysis of free energy data gated with excitation energy of the fragmenting source showed a dependence of fit parameters of Landau free energy equation on the excitation energy as well as isospin asymmetry of the source.

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