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96. 


Modelling of structural domains and elastic strain calculation in rhombohedral La1-xSrxMnO3 films on (110) SrTiO3



N. Farag, M. Bobeth, W. Pompe, A. E. Romanov

Philosophical Magazine 87, 823 (2007)

As reported in the literature, structural domains in (110) oriented rhombohedral La1-xSrxMnO3 (LSMO) films on (110) SrTiO3 show a pattern with alternating domain widths and inclined domain walls. An appropriate one-dimensional periodic domain model was developed and the non-uniform strain field in a coherently grown film was calculated by applying the coherency-defect approach. The strain is sharply peaked at the junction of the domain walls and the film/substrate interface. The dependence of the equilibrium domain-width ratio and domain-pattern period on film thickness was determined by minimizing the sum of elastic and domain-wall energies. The proposed domain structure can be formed only in a certain range of the film's crystal-structure data compared to the substrate. Corresponding composition-dependent structure data of LSMO are compiled.



doi absolute link10.1080/14786430600993331
online abstract at the publisher site
publisher site (ISSN:1478-6443)
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