X-ray absorption study of the local structure at the NiO/oxide interfaces
Entity
UAM. Departamento de Física AplicadaPublisher
International Union of CrystallographyDate
2013-05-06Citation
10.1107/S0909049513012417
Journal of Synchrotron Radiation 20.4 (2013): 635-640
ISSN
0909-0495 (print); 1600-5775 (online)DOI
10.1107/S0909049513012417Funded by
This work was partially supported by the Spanish CONSOLIDER Project FUNCOAT CSD2008-00023, the ENE2010-21198-C04-04 and MAT2011-27573-C04-04 projects and by the Aragón DGA NETOSHIMA grant. We acknowledge the Spanish Ministerio de Ciencia e Innovación and CSIC for financial support and for provision of synchrotron radiation and we would like to thank the staff of SpLine at ESRF and KMC2 at BESSY II for technical support. The research leading to these results has received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 22671Project
info:eu-repo/grantAgreement/EC/FP7/22671Editor's Version
http://dx.doi.org/10.1107/S0909049513012417Subjects
NiO; XANES; Oxide/oxide interfaces; FísicaRights
© 2013 International Union of CrystallographyAbstract
This work reports an X-ray absorption near-edge structure (XANES) spectroscopy study at the Ni K-edge in the early stages of growth of NiO on non-ordered SiO2, Al2O3 and MgO thin films substrates. Two different coverages of NiO on the substrates have been studied. The analysis of the XANES region shows that for high coverages (80 Eq-ML) the spectra are similar to that of bulk NiO, being identical for all substrates. In contrast, for low coverages (1 Eq-ML) the spectra differ from that of large coverages indicating that the local order around Ni is limited to the first two coordination shells. In addition, the results also suggest the formation of cross-linking bonds Ni - O - M (M = Si, Al, Mg) at the interface
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Google Scholar:Preda, Iulian
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Soriano Guillén, Leandro
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Díaz-Fernández, Daniel
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Domínguez-Cañizares, Guillermo
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Gutiérrez, Alejandro
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Castro, Germán Rafael
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Chaboy, Jesús
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