Misfit strain induced lattice distortions in heteroepitaxially grown LaxCa1-xMnO3 thin films studied by extended x-ray absorption fine structure and high-resolution x-ray diffraction
A. Miniotas et al., Misfit strain induced lattice distortions in heteroepitaxially grown LaxCa1-xMnO3 thin films studied by extended x-ray absorption fine structure and high-resolution x-ray diffraction, J APPL PHYS, 89(4), 2001, pp. 2134-2137
Mn-O and Mn-Mn interatomic distances were determined in LaxCa1-xMnO3 films
grown heteroepitaxially on single crystal SrTiO3 and LaAlO3 substrates by m
olecular beam epitaxy. Mn-O bond lengths were found to be fixed at similar
to1.975 Angstrom for both types of substrates, while the Mn-Mn distance was
detected to be larger for films grown on SrTiO3 substrates than for films
grown on LaAlO3. The deviation of Mn-Mn interatomic distances, and subseque
ntly Mn-O-Mn bond angles, in epitaxial LaxCa1-xMnO3 films is attributed to
the misfit strain: compressive for LaAlO3 and tensile for SrTiO3 substrates
. (C) 2001 American Institute of Physics.