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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pinitsoontorn, Supree
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2022The observation of spin Seebeck effect in opposite spin Hall angle materials of polycrystalline bulk-Fe3O4/(Co/Fe) systemscitations
- 2021Properties of Barium Ferrite Nanoparticles and Bacterial Cellulose-Barium Ferrite Nanocomposites Synthesized by a Hydrothermal Method
- 2021Preparation of low-temperature phase MnBi by sintering in vacuumcitations
- 2020Enhancing piezoelectric properties of bacterial cellulose films by incorporation of MnFe2O4 nanoparticlescitations
- 2020Carbon Nanofiber Aerogel/Magnetic Core-Shell Nanoparticle Composites as Recyclable Oil Sorbentscitations
- 2018White magnetic paper based on a bacterial cellulose nanocompositecitations
- 2018Magnetic behavior of novel alloyed L1 0 -phase Co 1-x Fe x Pt nanoparticlescitations
- 2018Magnetic behavior of novel alloyed L10-phase Co1-xFexPt nanoparticlescitations
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article
Magnetic behavior of novel alloyed L10-phase Co1-xFexPt nanoparticles
Abstract
<p>In this work, alloying of CoPt and FePt nanoparticles (NPs), i.e. the Co<sub>1-x</sub>Fe<sub>x</sub>Pt NPs (x = 0, 0.25, 0.5, 0.75, 1), were synthesized by the polyol process. These as-synthesized NPs show the A1 phase with a particle size less than 5 nm. After annealing at 700 °C, the A1 (cubic) phase was transformed to L1<sub>0</sub> (tetragonal) phase in all samples. The lattice parameters varied as a function of the composition. The particle size grew larger after annealing and the size distribution was wide ranging from <10 nm to >100 nm. The size and distribution was however independent of the Co(Fe) concentration. X-ray absorption spectroscopy indicated that there was a random distribution of Co and Fe atoms in the layered structure. Magnetic measurements of the annealed NPs showed that the magnetic hysteresis loop depends on the composition. The coercivity (H<sub>c</sub>) was very high for the CoPt and FePt NPs, whereas the M<sub>s</sub> value was maximized for the Co<sub>0.5</sub>Fe<sub>0.5</sub>Pt NPs. The variation of H<sub>c</sub> was attributed to the change in lattice parameters which could alter the exchange interaction, and thus the magnetocrystalline anisotropy. On the other hand, higher polarization and increased magnetic moments of Fe atoms were believed to be the reason for the enhanced M<sub>s</sub> in the Co(Fe)Pt NPs. In addition, all NPs were magnetically stable against temperature variation with changes in M<sub>s</sub> of less than 10%. The Curie temperature was expected to be as high as 800–900 K. Given these properties, these new forms of magnetic nanoparticles may find use in advanced magnetic recording technology.</p>