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Título: | Relationship between the magnetic properties and the formation of a ZNS/ZNO interface in s-capped ZnO nanoparticles and ZnS-ZnO thin films |
Autor: | Guglieri, C. CSIC; Espinosa, Ana CSIC ORCID; Carmona, N. CSIC ORCID; Laguna-Marco, M. A. CSIC ORCID ; Céspedes, Eva CSIC ORCID; Ruíz-González, M. L.; González-Calbet, José M.; García-Hernández, Mar CSIC ORCID ; García García-Tuñón, Miguel Ángel ; Chaboy, Jesús CSIC | Fecha de publicación: | 2013 | Editor: | American Chemical Society | Citación: | Journal of Physical Chemistry C 117(23): 12199-12209 (2013) | Resumen: | We have synthesized ZnO nanoparticles capped with butanethiol, octanethiol, and dodecanethiol. In all of the cases, the capped ZnO nanoparticles exhibit ferromagnetic-like behavior up to room temperature whose intrinsic origin has been demonstrated by using both X-ray magnetic circular dichroism (XMCD) and X-ray absorption spectroscopy (XAS) at the Zn K-edge. Using these tools, we have also determined that the occurrence of ferromagnetism does not critically depend on the details of the synthesis but on the formation of a pristine ZnS/ZnO interface. Within this interface, ferromagnetism is favored in those regions where the local order is closer to wurzite-like ZnO than to w-ZnS. The study of ZnS-ZnO films prepared by cosputtering clearly indicates that increasing the disorder of this interface weakens the onset of ferromagnetic behavior. © 2013 American Chemical Society. | URI: | http://hdl.handle.net/10261/95304 | DOI: | 10.1021/jp403336z | Identificadores: | doi: 10.1021/jp403336z issn: 1932-7447 e-issn: 1932-7455 |
Aparece en las colecciones: | (ICV) Artículos (ICMM) Artículos (ICMA) Artículos |
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