Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/344026
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | High-Temperature Synthesis of Ferromagnetic Eu3Ta3(O,N)9 with a Triple Perovskite Structure |
Autor: | Guarin, Jhonatan R.; Frontera, Carlos CSIC ORCID; Oró, Judith CSIC ORCID; Gàzquez, Jaume; Ritter, Clemens; Fontcuberta, Josep CSIC ORCID; Fuertes, Amparo CSIC ORCID | Palabras clave: | K2NiF4 structure Oxynitrides La |
Fecha de publicación: | 23-oct-2023 | Editor: | American Chemical Society | Citación: | Inorganic Chemistry 62(42): 17362-17370 (2023) | Resumen: | Europium tantalum perovskite oxynitrides were prepared by a new high-temperature solid-state synthesis under N2 or N2/H2 gas. The nitrogen stoichiometry was tuned from 0.63 to 1.78 atoms per Eu or Ta atom, starting with appropriate N/O ratios in the mixture of the reactants Eu2O3, EuN and Ta3N5, or Eu2O3 and TaON, which was treated at 1200 °C for 3 h. Two phases were isolated with compositions EuTaO2.37N0.63 and Eu3Ta3O3.66N5.34, showing different crystal structures and magnetic properties. Electron diffraction and Rietveld refinement of synchrotron radiation X-ray diffraction indicated that EuTaO2.37N0.63 is a simple perovskite with cubic Pm3̅m structure and cell parameter a = 4.02043(1) Å, whereas the new compound Eu3Ta3O3.66N5.34 is the first example of a triple perovskite oxynitride and shows space group P4/mmm with crystal parameters a = 3.99610(2), c = 11.96238(9) Å. The tripling of the c-axis in this phase is a consequence of the partial ordering of europium atoms with different charges in two A sites of the perovskite structure with relative ratio 2:1, where the formal oxidation states +3 and +2 are respectively dominant. Magnetic data provide evidence of ferromagnetic ordering developing at low temperatures in both oxynitrides, with saturation magnetization of about 6 μB and 3 μB per Eu ion for EuTaO2.37N0.63 and the triple perovskite Eu3Ta3O3.66N5.34 respectively, and corresponding Curie temperatures of about 7 and 3 K, which is in agreement with the lower proportion of Eu2+ in the latter compound. | Versión del editor: | http://doi.org/10.1021/acs.inorgchem.3c02691 | URI: | http://hdl.handle.net/10261/344026 | DOI: | 10.1021/acs.inorgchem.3c02691 | ISSN: | 0020-1669 |
Aparece en las colecciones: | (ICMAB) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Guarin_InorgChem_2023_editorial.pdf | 7,27 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
Page view(s)
9
checked on 26-abr-2024
Download(s)
4
checked on 26-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons