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Author Herrero-Martín, J. ♦ Mirone, A. ♦ Rodríguez, J. Fernández- ♦ Glatzel, P. ♦ Garcia, J. ♦ Blasco, J. ♦ Geck, J.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Strong Covalency ♦ Doping-dependent Electron Redistribution ♦ La1-xsr1 Xmno4 ♦ Hard Ray Probe ♦ Mn Site ♦ Mn Main Line ♦ La1-xsr1 Xmno4 Series ♦ Non-resonant Hard Ray Emission Spectroscopy ♦ Formal Valence ♦ Many-body Cluster Calculation ♦ Polycrystalline Sample ♦ Oxygen Atom ♦ Charge Density ♦ Linear Dichroism ♦ Electronic Structure ♦ Spin Density ♦ Hole Doping
Abstract The effect of doping on the electronic structure at the Mn sites in the La1-xSr1+xMnO4 series (x=0, 0.3 and 0.5) was studied by means of non-resonant hard X- ray emission spectroscopy (XES). We observe a linear dichroism in the Mn Kβ main lines (3p to 1s transitions) that is strongest for x=0 and decreases with increasing x to 0.5. The Mn Kβ main lines in the polycrystalline samples change considerably less upon increasing the hole doping (substitution of La by Sr) than it would be expected based on the change of formal valence. From this we conclude that the charge and spin density at the Mn sites are only little affected by doping. This implies that holes injected in the La1-xSr1+xMnO4 series mainly result in a decrease of charge density on the oxygen atoms, i.e. oxygen takes part in the charge balancing. These findings are supported by many-body cluster calculations
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Publisher Date 2009-01-01