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| Pàgina inicial > Articles > Articles publicats > Simultaneous individual and dipolar collective properties in binary assemblies of magnetic nanoparticles |
| Data: | 2020 |
| Resum: | Applications based on aggregates of magnetic nanoparticles are becoming increasingly widespread, ranging from hyperthermia to magnetic recording. However, although some uses require collective behavior, others need a more individual-like response, the conditions leading to either of these behaviors are still poorly understood. Here, we use nanoscale-uniform binary random dense mixtures with different proportions of oxide magnetic nanoparticles with low/high anisotropy as a valuable tool to explore the crossover from individual to collective behavior. Two different anisotropy scenarios have been studied in two series of binary compacts: M1, comprising maghemite (γ-Fe2O3) nanoparticles of different sizes (9. 0 nm/11. 5 nm) with barely a factor of 2 between their anisotropy energies, and M2, mixing equally sized pure maghemite (low-anisotropy) and Co-doped maghemite (high-anisotropy) nanoparticles with a large difference in anisotropy energy (ratio. |
| Ajuts: | European Commission 731976 Ministerio de Economía y Competitividad SEV-2017-0706 Agencia Estatal de Investigación MAT2016-77391-R Ministerio de Economía y Competitividad MAT2015-65295-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-292 |
| Nota: | Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya. |
| Drets: | Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió sotmesa a revisió |
| Matèria: | Anisotropy energies ; Collective behavior ; Collective properties ; Different proportions ; Dipolar interaction ; Dipolar systems ; High anisotropy ; Specific properties |
| Publicat a: | Chemistry of materials, Vol. 32, issue 3 (Feb. 2020) , p. 969-981, ISSN 1520-5002 |
Preprint 64 p, 2.9 MB |