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Wavelet investigation of La0.5Ca0.5CoO3−δ x-ray absorption data

Sahnoun, Mohammed ; Daul, Claude A. ; Haas, O.

In: Journal of Applied Physics, 2007, vol. 101, no. 1, p. 014911

Morlet wavelet transformation was used to analyze the Co K-edge extended x- ray absorption spectrum of La0.5Ca0.5CoO3−δ. Due to recent success in wavelet analysis of extended x-ray absorption fine structure (EXAFS) data we hoped that the Co–La scattering path could be separated from the Co–Ca scattering path in the EXAFS spectrum of...

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Investigation of the electronic structure in La1-xCaxCoO₃ (x = 0, 0.5) using full potential calculations

Sahnoun, Mohammed ; Daul, Claude A. ; Haas, O. ; Wokaun, A.

In: Journal of Physics: Condensed Matter, 2006, vol. 17, p. 7995-8003

The electronic and magnetic properties of both LaCoO₃ and La0.5Ca0.5CoO₃ have been investigated by means of ab initio full-potential augmented plane wave plus local orbitals (APW+lo) calculations carried out with the Wien 2k code. The functional used is the local-density approximation LDA +U. Doping with Ca²⁺ introduces holes into the Co–O...

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