scholarly journals Perfection in Nucleation and Growth of Blue-Phase Single Crystals: Small Free-Energy Required to Self-Assemble at Specific Lattice Orientation

2019 ◽  
Vol 11 (9) ◽  
pp. 9487-9495 ◽  
Author(s):  
Xiao Li ◽  
Jose A. Martínez-González ◽  
Kangho Park ◽  
Cecilia Yu ◽  
Ye Zhou ◽  
...  
Keyword(s):  
Free Energy ◽  
Single Crystals ◽  
Nucleation And Growth ◽  
Lattice Orientation ◽  
Blue Phase

scholarly journals Influence of the ultra-slow nucleation and growth dynamics on the room-temperature hysteresis of spin-crossover single crystals

2021 ◽  
pp. 138442
Author(s):  
Volodymyr M. Hiiuk ◽  
Karl Ridier ◽  
Il'ya A. Gural'skiy ◽  
Alexander A. Golub ◽  
Igor O. Fritsky ◽  
...  
Keyword(s):  
Single Crystals ◽  
Room Temperature ◽  
Spin Crossover ◽  
Growth Dynamics ◽  
Nucleation And Growth ◽  
Temperature Hysteresis

Phase-Dield Simulation of Rhombohedral and Tetragonal Phases in Ferroelectric Single Crystals

Aerospace ◽  
2006 ◽  
Author(s):  
T. Liu ◽  
C. S. Lynch
Keyword(s):  
Free Energy ◽  
Phase Transformations ◽  
Single Crystals ◽  
Electric Fields ◽  
Tetragonal Phase ◽  
Ferroelectric Materials ◽  
Integration Scheme ◽  
Ferroelectric Crystal ◽  
Domain Structures ◽  
Tdgl Equation

Ferroelectric materials exhibit spontaneous polarization and domain structures below the Curie temperature. In this work the phase field approach has been used to simulate phase transformations and the formation of ferroelectric domain structures. The evolution of phases and domain structures was simulated in ferroelectric single crystals by solving the time dependent Ginzburg-Landau (TDGL) equation with polarization as the order parameter. In the TDGL equation the free energy of a ferroelectric crystal is written as a function of polarization and applied fields. Change of temperature as well as application of stress and electric fields leads to change of the free energy and evolution of phase states and domain structures. In this work the finite difference method was implemented for the spatial description of the polarization and the temporal evolution of polarization field was computed by solving the TDGL equation with an explicit time integration scheme. Cubic to tetragonal, cubic to rhombohedral and rhombohedral to tetragonal phase transformations were modeled, and the formation of domain structures was simulated. Field induced polarization switching and rhombohedral to tetragonal phase transition were simulated.

On the Habit of Blue Phase II Liquid Single Crystals

1985 ◽  
Vol 40 (3) ◽  
pp. 260-262 ◽  
Author(s):  
Th. Blümel ◽  
H. Stegemeyer
Keyword(s):  
Single Crystals ◽  
Phase Ii ◽  
Bragg Reflection ◽  
Mixed System ◽  
Selective Reflection ◽  
Polarizing Microscopy ◽  
Crystallographic Form ◽  
Blue Phase

The growth of Blue Phase II liquid single crystals directly from the isotropic melt has been investigated in a mixed system of cholesteryl valerate and the nematogenic compound 8OBE by means of polarizing microscopy. Besides quadratic single crystals showing strong Bragg reflection additionally crystals of regular triangular habit with no detectable selective reflection have been found caused by the growth determining crystallographic form {111}.

Measurement of specific surface free energy of ruby and quartz single crystals using contact angle of liquids

2007 ◽  
Vol 42 (12) ◽  
pp. 1217-1221 ◽  
Author(s):  
Takaomi Suzuki ◽  
Naoki Sugihara ◽  
Eiichi Iguchi ◽  
Katsuya Teshima ◽  
Shuji Oishi ◽  
...  
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Specific Surface ◽  
Single Crystals ◽  
Surface Free Energy

scholarly journals Nucleation and growth of CdC2O4·3H2O single crystals in silica gels

1993 ◽  
Vol 16 (4) ◽  
pp. 309-315 ◽  
Author(s):  
M R Shedam ◽  
A Venkateswara Rao
Keyword(s):  
Single Crystals ◽  
Nucleation And Growth ◽  
Silica Gels
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