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Final state effects in the X-ray absorption spectra of La0.7Sr0.3MnO3

Ola Wessely ; Pierre Roy ; Daniel Åberg ; Cecilia Andersson ; Sverker Edvardsson ; Olof Karis ; Biplab Sanyal ; Peter Svedlindh ; M Katsnelson ; Robert Gunnarsson (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Olivier Bengone ; Olle Eriksson
Journal of Magnetism and Magnetic Materials Vol. 272-276 (2004), part 3, p. 1780-1781.
[Konferensbidrag, refereegranskat]

We present a comparison of theoretical calculations of the electronic structure of La0.7Sr0.3MnO3 with measurements of the unoccupied local density of states for Mn obtained from X-ray absorption spectroscopy (XAS). We compare two different theoretical calculations of the Mn XAS spectra, one based on the local spin density approximation (LSDA) and the other one based on an atomic Hartree–Fock calculation for the Mn ions. In the atomic calculation the solid state effects are introduced through a cubic crystal field where the crystal field strength is obtained from the LSDA calculation. It is found that the atomic calculations agree better with experimental data.

Nyckelord: manganite, XAS



Denna post skapades 2006-08-29.
CPL Pubid: 3322

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Fysik

Chalmers infrastruktur