| People | Locations | Statistics |
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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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Nouailhetas, Quentin
Université de Lorraine
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2022Microstructural Parameters for Modelling of Superconducting Foamscitations
- 2022Synthesis, Characterization and Comparison of New Bulk Superconductors ; Synthèse, caractérisation et comparaison de nouveaux supraconducteurs massifs
- 2021Preparation of superconducting Iron-selenide using Spark Plasma Sintering ; Synthèse de Fer-Sélénium (FeSe) supraconducteur par Frittage Flash
- 2021Magnetic phases in superconducting, polycrystalline bulk FeSe samples
- 2021Magnetic phases in superconducting, polycrystalline bulk FeSe samplescitations
- 2021Review on the Use of Superconducting Bulks for Magnetic Screening in Electrical Machines for Aircraft Applicationscitations
- 2020On the origin of the sharp, low-field pinning force peaks in MgB2 superconductorscitations
- 2020Magnetic phases in superconducting, polycrystalline bulk FeSe samples
- 2019Electron Irradiation of Polycrystalline Bulk FeSe Superconductors
- 2019Electron Irradiation of Polycrystalline Bulk FeSe Superconductors
- 2019Exploring the flux pinning performance of bulk FeSe by electron irradiation
- 2019Exploring the flux pinning performance of bulk FeSe by electron irradiation
- 2019Exploring the potential of FeSe bulk superconductors
Places of action
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article
On the origin of the sharp, low-field pinning force peaks in MgB2 superconductors
Abstract
Various MgB2 thin films and single crystals were found in the literature to exhibit a sharp, narrow peak at low fields in the volume pinning force, Fp(H)-diagrams. The origin of this peak is associated with a steep drop of the current density when applying external magnetic fields and is ascribed to sample purity. We show here that bulk MgB2 prepared by spark-plasma sintering also shows the sharp, narrow peak in Fp. The peak is also seen in the volume pinning force scaling, Fp/Fp,max vs h = H/H irr. Furthermore, polycrystalline bulk MgB2 samples prepared close to the optimum reaction temperature reveal this peak effect as well, but other samples of the series show a regular scaling behavior. The combination of magnetization data with data from electric transport measurements on the same samples demonstrates the origin of this peak effect. On increasing preparation temperature, the pinning force scaling changes from grain boundary pinning to point pinning and the grain connectivity gets worse. Hence, the sharp, low-field peak in Fp vanishes. Therefore, the occurrence of the peak effect in Fp gives important information on the grain coupling in the MgB2 samples.