Web of Science: 54 cites, Scopus: 56 cites, Google Scholar: cites
Enhanced magnetic properties in antiferromagnetic-core/ferrimagnetic-shell nanoparticles
Vasilakaki, Marianna (Ethniko Kentro Ereunas Physikōn Epistēmōn "Demokritos")
Trohidou, Kalliopi N. (Ethniko Kentro Ereunas Physikōn Epistēmōn "Demokritos")
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia)

Data: 2015
Resum: Bi-magnetic core/shell nanoparticles are gaining increasing interest due to their foreseen applications. Inverse antiferromagnetic(AFM)/ferrimagnetic(FiM) core/shell nanoparticles are particularly appealing since they may overcome some of the limitations of conventional FiM/AFM systems. However, virtually no simulations exist on this type of morphology. Here we present systematic Metropolis Monte Carlo simulations of the exchange bias properties of such nanoparticles. The coercivity, H C, and loop shift, H ex, present a non-monotonic dependence with the core diameter and the shell thickness, in excellent agreement with the available experimental data. Additionally, we demonstrate novel unconventional behavior in FiM/AFM particles. Namely, while H C and H ex decrease upon increasing FiM thickness for small AFM cores (as expected), they show the opposite trend for large cores. This presents a counterintuitive FiM size dependence for large AFM cores that is attributed to the competition between core and shell contributions, which expands over a wider range of core diameters leading to non-vanishing H ex even for very large cores. Moreover, the results also hint different possible ways to enhance the experimental performance of inverse core/shell nanoparticles for diverse applications.
Ajuts: MINECO/MAT2010-20616-C02
MINECO/MAT2013-48628-R
MINECO/SEV-2013-0295
AGAUR/2014/SGR-1015
Drets: 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. Creative Commons
Llengua: Anglès
Document: Article ; recerca ; Versió publicada
Publicat a: Scientific reports (Nature Publishing Group), Vol. 5 (2015) , art. 9609, ISSN 2045-2322

DOI: 10.1038/srep09609
PMID: 25872473


7 p, 1.3 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Institut Català de Nanociència i Nanotecnologia (ICN2)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2019-06-03, darrera modificació el 2021-08-01



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