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- W1549764821 abstract "Twinning, i.e., the formation of structural domains, in La1−xSrxMnO3 thin films, which grow coherently on (001)-oriented cubic substrates, is explained as a result of shear strain relaxation within the distorted rhombohedral La1−xSrxMnO3 crystal lattice. A one-dimensional periodic model structure of twins is proposed and the nonuniform elastic strains within twinned La1−xSrxMnO3 films are calculated by applying the coherency-defect technique. The strain field depends on the ratio of the domain width and film thickness and exhibits maxima at the triple junctions of the domain boundaries and the film/substrate interface. The equilibrium domain width is derived as a function of the film thickness by minimizing the total energy of the system including contributions from elastic strain and domain-wall energy. From comparison of the theoretical results with recent electron microscope observations of twins the domain-wall energy can be predicted. From the observed average domain width in La0.67Sr0.33MnO3 films, the domain-wall energy of 1.35mJ∕m2 is suggested. The possibility of a preferred nucleation of the ferromagnetic phase at triple junctions due to spatial strain variations is discussed." @default.
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- W1549764821 date "2005-05-26" @default.
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- W1549764821 title "Modeling of twinning in epitaxial (001)-oriented La0.67Sr0.33MnO3 thin films" @default.
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- W1549764821 doi "https://doi.org/10.1063/1.1914950" @default.
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