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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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Kidkhunthod, Pinit
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Publications (7/7 displayed)
- 2024Effective Prevention of Palladium Metal Particles Sintering by Histidine Stabilization on Silica Catalyst Supportcitations
- 2021Modulation of Single Atomic Co and Fe Sites on Hollow Carbon Nanospheres as Oxygen Electrodes for Rechargeable Zn–Air Batteriescitations
- 2020Elucidating the Coordination of Diethyl Sulfide Molecules in Copper(I) Thiocyanate (CuSCN) Thin Films and Improving Hole Transport by Antisolvent Treatmentcitations
- 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
- 2016Effect of TiO2 on optical properties of glasses in the soda-lime-silicate systemcitations
- 2014Structure of Ba-Ti-Al-O glasses produced by aerodynamic levitation and laser heating.citations
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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>