Strain effects and anomalous x-ray scattering in tetragonal manganites

Details Strain effects and anomalous x-ray scattering in tetragonal manganites Strain effects and anomalous x-ray scattering in tetragonal manganites

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004njph....6..165b&link_type=abstract

New Journal of Physics, Volume 6, Issue 1, pp. 165 (2004).

Physics

Scientific paper

Using an ab initio pseudopotential approach, we examine the effect of variations in the c/a ratio on the Mn K-edge anomalous x-ray scattering tensor in La0.5 Sr0.5 MnO3 films coherently strained by growth on several different perovskite substrates. The calculations agree well with the results of recent Mn K-edge interference scattering measurements on these systems. Comparison with experiment supports the interpretation that the anomalous scattering signal is determined by the Jahn Teller distortion, as opposed to the effect of the Mn 3d 4p onsite Coulomb interaction proposed earlier.

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