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Título: | Unconventional properties of nanometric FeO(111) films on Ru(0001): Stoichiometry and surface structure |
Autor: | Martín-García, Laura CSIC; Bernal-Villamil, Iván CSIC; Oujja, Mohamed CSIC ORCID ; Carrasco, Esther CSIC ORCID; Gargallo-Caballero, R. CSIC; Castillejo, Marta CSIC ORCID ; Marco, J.F. CSIC ORCID CVN ; Gallego, Silvia CSIC ORCID ; de la Figuera, Juan CSIC ORCID CVN | Fecha de publicación: | 7-mar-2016 | Citación: | Journal of Materials Chemistry C 4(9): 1850-1859 (2016) | Resumen: | We report on the growth of high quality monocrystalline and stoichiometric FeO(111) films on Ru(0001) by infrared pulsed laser deposition (IR-PLD), in a thickness range from below 1 nm to above 8 nm. The films are characterized by low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS) and ion scattering spectroscopy (ISS). Besides the 1 : 1 Fe/O ratio, they show some unexpected properties, such as the lack of Fe sites at the surface, the (1 × 1) surface symmetry and the large lattice expansion. First-principles calculations show that these properties can be understood from the existence of a wurtzite-like environment at the surface region that preserves the bulk-like antiferromagnetism. This extends the validity of stacking-faults as efficient mechanisms to compensate surface polarity, and suggests that surface-induced processes can be tailored to design nanoscaled materials beyond the parent bulk phase diagram. | Versión del editor: | http://doi.org/10.1039/C5TC03871E | URI: | http://hdl.handle.net/10261/166349 | DOI: | 10.1039/c5tc03871e | Identificadores: | doi: 10.1039/c5tc03871e issn: 2050-7526 |
Aparece en las colecciones: | (IQF) Artículos (ICMM) Artículos |
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