TY - JOUR
T1 - Phenomenological theory of a single domain wall in uniaxial trigonal ferroelectrics
T2 - Lithium niobate and lithium tantalate
AU - Scrymgeour, David A.
AU - Gopalan, Venkatraman
AU - Itagi, Amit
AU - Saxena, Avadh
AU - Swart, Pieter J.
PY - 2005
Y1 - 2005
N2 - A phenomenological treatment of domain walls based on the Ginzburg-Landau-Devonshire theory is developed for uniaxial trigonal ferroelectrics, lithium niobate and lithium tantalate. The contributions to the domain-wall energy from polarization and strain as a function of orientation are considered. Analytical expressions are developed that are analyzed numerically to determine the minimum polarization, strain, and energy configurations of domain walls. It is found that hexagonal y walls are preferred over x walls in both materials. This agrees well with experimental observation of domain geometries in stoichiometric composition crystals.
AB - A phenomenological treatment of domain walls based on the Ginzburg-Landau-Devonshire theory is developed for uniaxial trigonal ferroelectrics, lithium niobate and lithium tantalate. The contributions to the domain-wall energy from polarization and strain as a function of orientation are considered. Analytical expressions are developed that are analyzed numerically to determine the minimum polarization, strain, and energy configurations of domain walls. It is found that hexagonal y walls are preferred over x walls in both materials. This agrees well with experimental observation of domain geometries in stoichiometric composition crystals.
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U2 - 10.1103/PhysRevB.71.184110
DO - 10.1103/PhysRevB.71.184110
M3 - Article
AN - SCOPUS:33644535176
SN - 1098-0121
VL - 71
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 18
M1 - 184110
ER -