117330 20240319080947.0 doi 10.3390/nano12071232 sideral 128325 ART-2022-128325 eng Barriuso, E. Direct epitaxial growth of polar Hf0.5 Zr0.5 O2 films on corundum 2022 Access copy available to the general public Unrestricted Single-phase epitaxial Hf0.5 Zr0.5 O2 films with non-centrosymmetric orthorhombic structure have been grown directly on electrode-free corundum (a-Al2 O3) substrates by pulsed laser deposition. A combination of high-resolution X-ray diffraction and X-ray absorption spectroscopy confirms the epitaxial growth of high-quality films belonging to the Pca21 space group, with 111] out-of-plane orientation. The surface of a 7-nm-thick sample exhibits an atomic step-terrace structure with a corrugation of the order of one atomic layer, as proved by atomic force microscopy. Scanning transmission electron microscopy reveals that it consists of grains with around 10 nm lateral size. The polar nature of this film has been corroborated by pyroelectric measurements. These results shed light on the mechanisms of the epitaxial stabilization of the ferroelectric phase of hafnia. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. info:eu-repo/grantAgreement/ES/AEI/PID2019-107338RB-C64 info:eu-repo/grantAgreement/ES/DGA/E28-20R info:eu-repo/grantAgreement/ES/DGA-FSE/E12-20R info:eu-repo/grantAgreement/EC/H2020/ 861153/EU/Materials for Neuromorphic Circuits/MANIC This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 861153-MANIC info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3 This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 823717-ESTEEM3 info:eu-repo/grantAgreement/ES/MCIU/PID2020-112914RB-I00 info:eu-repo/grantAgreement/ES/MCIN/AEI/10.13039/501100011033 info:eu-repo/grantAgreement/ES/MICINN/MAT2017-88788-R info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 5.3 2022 PHYSICS, APPLIED 39 / 160 = 0.244 2022 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 51 / 107 = 0.477 2022 Q2 T2 CHEMISTRY, MULTIDISCIPLINARY 58 / 178 = 0.326 2022 Q2 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 110 / 343 = 0.321 2022 Q2 T1 0.811 2022 Chemical Engineering (miscellaneous) 2022 Q1 Materials Science (miscellaneous) 2022 Q2 7.4 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Koutsogiannis, P. Serrate, D. Herrero-Martín, J. Jiménez, R. Magén, C. Universidad de Zaragoza (orcid)0000-0002-6761-6171 Algueró, M. Algarabel, P. A. Pardo, J. A. Universidad de Zaragoza (orcid)0000-0002-0111-8284 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 12, 7 (2022), 1232 [11 pp] Nanomaterials (Basel) Nanomaterials 2079-4991 16086148 http://zaguan.unizar.es/record/117330/files/texto_completo.pdf Versión publicada 2745789 http://zaguan.unizar.es/record/117330/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:117330 articulos driver 2024-03-18-12:43:08 ARTICLE