Interplay between inter- and intraparticle interactions in bi-magnetic core/shell nanoparticles
| Autor: | G. Margaris, M. Vasilakaki, Silvia Villa, Fabio Canepa, Davide Peddis, Alexander Omelyanchik, A. M. Ferretti, Gurvinder Singh, A. Ponti, Kalliopi N. Trohidou |
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| Rok vydání: | 2021 |
| Předmět: |
interparticle interactions
Materials science Shell (structure) Nanoparticle Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Condensed Matter::Materials Science Magnetization cobalt ferrite General Materials Science nickel ferrite Saturation (magnetic) Mesoscopic physics General Engineering bi-magnetic core/shell nanoparticles General Chemistry 021001 nanoscience & nanotechnology intraparticle interactions Atomic and Molecular Physics and Optics 0104 chemical sciences Magnetic anisotropy Magnetic core Chemical physics 0210 nano-technology Superparamagnetism |
| Zdroj: | Nanoscale advances Online 3 (2021): 6912–6924. doi:10.1039/d1na00312g info:cnr-pdr/source/autori:Omelyanchik A.; Villa S.; Vasilakaki M.; Singh G.; Ferretti A.M.; Ponti A.; Canepa F.; Margaris G.; Trohidou K.N.; Peddis D./titolo:Interplay between inter-and intraparticle interactions in bi-magnetic core%2Fshell nanoparticles/doi:10.1039%2Fd1na00312g/rivista:Nanoscale advances Online/anno:2021/pagina_da:6912/pagina_a:6924/intervallo_pagine:6912–6924/volume:3 |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/d1na00312g |
| Popis: | The synthesis strategy and magnetic characterisation of two systems consisting of nanoparticles with core/shell morphology are presented: an assembly of hard/soft nanoparticles with cores consisting of magnetically hard cobalt ferrite covered by a magnetically soft nickel ferrite shell, and the inverse system of almost the same size and shape. We have successfully designed these nanoparticle systems by gradually varying the magnetic anisotropy resulting in this way in the modulation of the magnetic dipolar interactions between particles. Both nanoparticle systems exhibit high saturation magnetisation and display superparamagnetic behaviour at room temperature. We have shown strong exchange coupling at the core/shell interface of these nanoparticles systems which was also confirmed by mesoscopic modelling. Our results demonstrate the possibility of modulating magnetic anisotropy not only by chemical composition but also by adopting the proper nano-architecture. This journal is |
| Databáze: | OpenAIRE |
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