Direct evidence for an interdiffused intermediate layer in bi-magnetic core-shell nanoparticles
Juhin, Amélie (Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC))
López-Ortega, Alberto (Università Degli Studi di Firenze)
Sikora, Marcin (AGH University of Science and Technology)
Carvallo, Claire (Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC))
Estrader, Marta (Institut Català de Nanociència i Nanotecnologia)
Estrade, Sonia (Universitat de Barcelona)
Peiro, Francesca (Universitat de Barcelona)
Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física)
Sainctavit, Philippe (Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC))
Glatzel, Pieter (European Synchrotron Radiation Facility)
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia)

Date:	2014
Abstract:	Core-shell nanoparticles attract continuously growing interest due to their numerous applications, which are driven by the possibility of tuning their functionalities by adjusting structural and morphological parameters. However, despite the critical role interdiffused interfaces may have in the properties, these are usually only estimated in indirect ways. Here we directly evidence the existence of a 1. 1 nm thick (Fe,Mn)O interdiffused intermediate shell in nominally γ-FeO-MnO core-shell nanoparticles using resonant inelastic X-ray scattering spectroscopy combined with magnetic circular dichroism (RIXS-MCD). This recently developed magneto-spectroscopic probe exploits the unique advantages of hard X-rays (i. e. , chemical selectivity, bulk sensitivity, and low self-absorption at the K pre-edge) and can be advantageously combined with transmission electron microscopy and electron energy loss spectroscopy to quantitatively elucidate the buried internal structure of complex objects. The detailed information on the structure of the nanoparticles allows understanding the influence of the interface quality on the magnetic properties.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1015 Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-35 Ministerio de Economía y Competitividad MAT2010-20616-C02 Ministerio de Economía y Competitividad MAT2010-16407
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Chemical selectivity ; Core-shell nanoparticles ; Intermediate layers ; Internal structure ; Magnetic circular dichroisms ; Morphological parameters ; Resonant inelastic x-ray scattering ; Spectroscopic probes
Published in:	Nanoscale, Vol. 6, Issue 20 (October 2014) , p. 11911-11920, ISSN 2040-3372

DOI: 10.1039/c4nr02886d

10 p, 651.8 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles