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000017846 084__ $$2WoS$$aChemistry, Physical
000017846 084__ $$2WoS$$aPhysics, Atomic, Molecular & Chemical
000017846 1001_ $$0P:(DE-Juel1)138081$$aLenser, C.$$b0$$uFZJ
000017846 245__ $$aSpectroscopic study of the electric field induced valence change of Fe-defect centers in SrTiO(3)
000017846 260__ $$aCambridge$$bRSC Publ.$$c2011
000017846 300__ $$a20779 - 20786
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000017846 440_0 $$04916$$aPhysical Chemistry Chemical Physics$$v13$$x1463-9076$$y46
000017846 500__ $$3POF3_Assignment on 2016-02-29
000017846 500__ $$aThis work has been performed within the EC FP7 MATERA project "Functional materials for resistive switching memories" (FMRSM). The authors acknowledge financial support by the NRW-EU Ziel 2-Programm. The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 226716 (Project I-20090034 EC). A.K. and J.P. were supported by the ESF and ERAF Projects 2009/0202/1DP/1.1.1.2.0/09/APIA/VIAA/141 and 2010/0272/2DP/2.1.1.1.0/10/APIA/VIAA/088, respectively. The authors would like to thank the European Synchrotron Radiation Facility (ESRF) for the beamtime at BM29 (project number MA-923), as well as the Hamburger Synchrotronstrahlungslabor (HASYLAB) for the beamtime at beamline A1 (project number I-20090034 EC) and the respective beamline personnel for their support, as well as Sebastian Wicklein and Marcin Wojtyniak for assistance during the beamtimes. The authors thank Dr R. Merkle for the possibility to use reference experimental EXAFS data of the powders solid solutions SrFe<INF>0.1</INF>Ti<INF>0.9</INF>O<INF>3-x</INF>, and P. Meuffels and C. Makovicka for providing the LaFeO<INF>3</INF> powder.
000017846 520__ $$aThe electrochemical changes induced by an electric field in Fe-doped SrTiO(3) have been investigated by X-ray absorption spectroscopy (XANES and EXAFS), electron paramagnetic resonance (EPR) and Raman spectroscopy. A detailed study of the Fe dopant in the regions around the anode and cathode reveals new insights into the local structure and valence state of Fe in SrTiO(3) single crystals. The ab initio full multiple-scattering XANES calculations give an evidence of the oxygen vacancy presence in the first coordination shell of iron. Differences in the length and disorder of the Fe-O bonds as extracted from EXAFS are correlated to the unequivocal identification of the defect type by complementary spectroscopical techniques to identify the valence state of the Fe-dopant and the presence of the Fe - V(Ö) complexes. Through this combinatorial approach, novel structural information on Fe - V(Ö) complexes is provided by X-ray absorption spectroscopy, and the relation of Fe-O bond length, doping level and oxidation state in SrTi(1-x)Fe(x)O(3) is briefly discussed.
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000017846 7001_ $$0P:(DE-HGF)0$$aKalinko, A.$$b1
000017846 7001_ $$0P:(DE-Juel1)VDB19176$$aKuzmin, A.$$b2$$uFZJ
000017846 7001_ $$0P:(DE-HGF)0$$aBerzins, D.$$b3
000017846 7001_ $$0P:(DE-HGF)0$$aPurans, J.$$b4
000017846 7001_ $$0P:(DE-Juel1)VDB2799$$aSzot, K.$$b5$$uFZJ
000017846 7001_ $$0P:(DE-Juel1)131022$$aWaser, R.$$b6$$uFZJ
000017846 7001_ $$0P:(DE-Juel1)VDB5464$$aDittmann, R.$$b7$$uFZJ
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000017846 8567_ $$uhttp://dx.doi.org/10.1039/C1CP21973A
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