Theoretical Study of the Ferroelastic Domain Structure in La_{0.95}Sr_{0.05}Ga_{0.9}Mg_{0.1}O_{3-x}

• Authors: D. Savytskii , T. Tataryn , N. Martynyuk , U. Bismayer
• Languages of publication: EN

Abstracts

EN

Theoretical analysis of the ferro-elastic domain structure of a La_{0.95}Sr_{0.05}Ga_{0.9}Mg_{0.1}O_{2.925} crystal in three different crystallographic phases is presented. Parameters of these configurations are obtained using group theoretical approach, the method of spontaneous deformation as well as theoretical interpretation of twinning resulting from mechanical deformation (mechanical twinning theory). In the three phases of La_{0.95}Sr_{0.05}Ga_{0.9}Mg_{0.1}O_{2.95} - trigonal, orthorhombic and monoclinic - the parameters of ferro-elastic domain structures are determined; namely the quantity of orientation states, symmetry elements of connection between states, orientations and types of domain walls, tensors of spontaneous deformations of the perovskite-type cells for every orientation state, elements of twin shifts, which are needed for the reorientation of some orientation states to others. By using the found parameters of bidomain configurations a mechanism is proposed, which causes chevron-like domain configurations in compounds with martensitic phase transitions.

Keywords

EN

61.72.Mm; 61.72.-y; 61.50.Ah

Discipline

• 61.50.Ah: Theory of crystal structure, crystal symmetry; calculations and modeling
• 61.72.Mm: Grain and twin boundaries
• 61.72.-y: Defects and impurities in crystals; microstructure(for radiation induced defects, see 61.80.-x; for defects in surfaces, interfaces, and thin films, see 68.35.Dv and 68.55.Ln; see also 85.40.Ry Impurity doping, diffusion, and ion implantation technology; for effects of crystal defects and doping on superconducting transition temperature, see 74.62.Dh)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 1
• Pages: 48-61

Dates

published

2010-01

Contributors

author

D. Savytskii

• Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine
• SRC "Carat", 202 Stryjska St., 79031 Lviv, Ukraine

author

T. Tataryn

• Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine

author

N. Martynyuk

• Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine

author

U. Bismayer

• Universität Hamburg, Grindelallee 48, D-20146 Hamburg, Germany

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Identifiers

DOI

10.12693/APhysPolA.117.48