Web of Science: 12 citations, Scopus: 12 citations, Google Scholar: citations
Maximizing Exchange Bias in Co/CoO Core/Shell Nanoparticles by Lattice Matching between the Shell and the Embedding Matrix
González, Juan A. (Instituto Regional de Investigación Científica Aplicada)
Andrés, Juan P. (Instituto Regional de Investigación Científica Aplicada)
López Antón, Ricardo (Instituto Regional de Investigación Científica Aplicada)
De Toro, José A. (Instituto Regional de Investigación Científica Aplicada)
Normile, Peter S. (Instituto Regional de Investigación Científica Aplicada)
Muñiz, Pablo (Instituto Regional de Investigación Científica Aplicada)
Riveiro, J. Manuel (Instituto Regional de Investigación Científica Aplicada)
Nogués i Sanmiquel, Josep (Institut Català de Nanociència i Nanotecnologia)

Date: 2017
Abstract: The exchange bias properties of 5 nm Co/CoO ferromagnetic/antiferromagnetic core/shell nanoparticles, highly dispersed in a CuO matrix, have been optimized by matching the lattice parameter of the matrix with that of the CoO shell. Exchange bias and coercivity fields as large as H = 7780 Oe and H = 6950 Oe are linked to the presence of a CuO matrix (0. 3% lattice mismatch with respect to the shells). The small mismatch between CuO and CoO plays a dual role: it (i) structurally stabilizes the CoO and (ii) favors the existence of a large amount of uncompensated moments in the shell that enhance the exchange bias effects. The results indicate that lattice matching may be a very efficient way to improve the exchange bias properties of core/shell nanoparticles, paving the way to novel approaches to tune their magnetic properties.
Note: Número d'acord de subvenció MINECO/MAT2011-26207
Note: Número d'acord de subvenció AGAUR/2014/SGR-1015
Note: Número d'acord de subvenció MINECO/SEV‐2013‐0295
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; recerca ; submittedVersion
Subject: Coercivity field ; Core/shell nanoparticles ; Dual role ; Embedding matrices ; Exchange bias ; Exchange bias effects ; Large amounts ; Lattice matching
Published in: Chemistry of Materials, Vol. 29, Issue 12 (June 2017) , p. 5200-5206, ISSN 1520-5002

DOI: 10.1021/acs.chemmater.7b00868


Preprint
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The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2019-10-21, last modified 2020-01-16



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