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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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Skumiel, Andrzej
Adam Mickiewicz University in Poznań
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2016The influence of oxidation process on exchange bias in egg-shaped FeO/Fe<inf>3</inf>O<inf>4</inf> core/shell nanoparticlescitations
- 2013Investigation of ultrasonic emulsifying processes of a linseed oil and water mixturecitations
- 2012Thermophysical and magnetic properties of carbon beads containing cobalt nanocrystallitescitations
- 2011Thermophysical and magnetic properties of carbon beads containing nickel nanocrystallitescitations
- 2011Structuring from nanoparticles in oil-based ferrofluidscitations
- 2011Magnetically induced anisotropy of electric permittivity in the PDMS ferromagnetic gelcitations
- 2010Effect of poly(Ethylene Glycol) coating on the acoustic properties of biocompatible magnetic fluidcitations
- 2009Magnetic properties and heating effect in bacterial magnetic nanoparticlescitations
- 2008The effect of temperature on the electric conductivity of poly(dimethyl siloxane) ferromagnetic gelcitations
Places of action
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article
The influence of oxidation process on exchange bias in egg-shaped FeO/Fe<inf>3</inf>O<inf>4</inf> core/shell nanoparticles
Abstract
<p>Egg-shaped nanoparticles with a core-shell morphology were synthesized by thermal decomposition of an iron oleate complex. XRD and M(T) magnetic measurements confirmed the presence of FeO (wustite) and Fe<sub>3</sub>O<sub>4</sub> (magnetite) phases in the nanoparticles. Oxidation of FeO to Fe<sub>3</sub>O<sub>4</sub> was found to be the mechanism for the shell formation. As-made nanoparticles exhibited high values of exchange bias at 2 K. Oxidation led to decrease of exchange field from 2880 Oe (in as-made sample) to 330 Oe (in oxidized sample). At temperatures higher than the Néel temperature of FeO (200 K) there was no exchange bias. An interesting observation was made showing the exchange field to be higher than the coercive field at temperatures close to magnetite's Verwey transition.</p>