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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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Ahlburg, Jakob Voldum
Aarhus University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2022In-depth investigations of size and occupancies in cobalt ferrite nanoparticles by joint Rietveld refinements of X-ray and neutron powder diffraction datacitations
- 2022Combined characterization approaches to investigate magnetostructural effects in exchange-spring ferrite nanocomposite magnetscitations
- 2021Synthesis and Characterization of a Magnetic Ceramic Using an Easily Accessible Scale Setupcitations
- 2020Exploring the direct synthesis of exchange-spring nanocomposites by reduction of CoFe 2 O 4 spinel nanoparticles using in situ neutron diffractioncitations
- 2020Exploring the direct synthesis of exchange-spring nanocomposites by reduction of CoFe2O4 spinel nanoparticles using in situ neutron diffractioncitations
- 2020Realising Sample Environments for X-ray and Neutron Powder Diffraction
- 2020Ultra-Fast Heating – Induction furnace for POLARIS
- 2019Novel fast heating furnaces for in situ powder neutron diffraction
- 2019Structure and magnetic properties of W-type hexaferritescitations
- 2019Magnetostructural effects in exchange-spring nanocomposite magnets probed by combined X-ray & neutron scattering
- 2019Novel in situ powder neutron diffraction setups – The creation of a modern magnetic compound
- 2019Air-heated solid–gas reaction setup for in situ neutron powder diffractioncitations
- 2019In Situ In-House Powder X-ray Diffraction Study of Zero-Valent Copper Formation in Supercritical Methanolcitations
- 2019In Situ In-House Powder X-ray Diffraction Study of Zero-Valent Copper Formation in Supercritical Methanolcitations
- 2019Laboratory setup for rapid in situ powder X-ray diffraction elucidating Ni particle formation in supercritical methanolcitations
- 2018X-ray and neutron diffraction magnetostructural investigations on exchange-coupled nanocomposite magnets
- 2018Koercivitetsforbedring af strontium hexaferrit nano-krystallitter gennem morfologikontrolleret udglødning. ; Coercivity enhancement of strontium hexaferrite nano-crystallites through morphology controlled annealingcitations
- 2018Approaching Ferrite-Based Exchange-Coupled Nanocomposites as Permanent Magnetscitations
- 2018Coercivity enhancement of strontium hexaferrite nano-crystallites through morphology controlled annealingcitations
- 2017Optimization of spring exchange coupled ferrites, studied by in situ neutron diffraction.
- 2015Particle size optimization of SrFe12O19 magnetic nanoparticles
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document
Particle size optimization of SrFe12O19 magnetic nanoparticles
Abstract
Particle size optimization ofSrFe12O19 magnetic nanoparticles.J. Ahlburg,a M. S. Músquiza, C. Zeuthena, S. Kjeldgaarda, M. Stingaciua, M. ChristensenaaCenter for Materials Crystallography, Departement of Chemistry & iNano, Aarhus University, DenmarkSince the invention of the electric motor, magnets have been a keystone in the electric era in which we live. Nowadays people carry around magnets in every small electronic device or gadget and magnets are being used as a diagnostic in medicine. [1] This puts a high demand on controlling the magnetic properties. Since the discovery of quantum mechanics magnetism have been described and measured on an atomic level, and the magnetic properties of bulk magnet can easily be measured, but what lies in between, the nanoscale region, have just recently been addressed. [2] Ferrites have shown great promise in the field of non-rare-earth metal magnets and the number of publications has grown exponentially for the last 50 years. [3] SrFe12O19 has excellent magnetic properties due to the high anisotropy of the unitcell and by making nanoparticles it is possible to have single magnetic domain particles. [4] This will greatly improve the energy product pr. Volume, which is needed in small devices.When nanoparticles of SrFe12O19 are formed the growth is furthermore such that platelets are formed making them easy to stack when forming a bulk magnet. In these studies we want to control the size and shape of the particles by using a simple setup suitable for rapid small scale testing of various synthesis conditions and teaching purposes. The setup allows changing temperature, pressure to adopted to near critical conditions of water.[5] The size and shape of the product can furthermore be controlled by varying the Sr:Fe ratio. X-ray powder diffraction is used to extract size and shape of the produced nanocrystallites. Furthermore it is demonstrated how it is possible to measure the magnetic properties using a very simple setup suitable for teaching purposes. To measure the magnetic properties the prepared nanocrystallites are compacted by cold pressing and sintered to increase the mechanical stability.[1] Sara A. Majetich et. al: Mrs bulletin, 38, 2013 [2] Weidenthaler C. Nanoscale,2011, 3, 792-810 [3] Pullar C. R. Progress in Materials Science 2012, 57, 1191–1334 [4] Fang, C. M.; Kools, F.; Metselaar, R.; de With, G.; de Groot, R. A. Journal of Physics: Condenced Matter 2003, 15, 6229–6237. [5] Drofenik, M.; Kristl, M.; Žnidaršic, A.; Hanžel, D.; Lisjak, D. Journal of the American Ceramic Society July 2007, 90, 2057–2061.