| 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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Koblischka-Veneva, Anjela
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Functional LSMO foams for magneto-caloric applications
- 2024Review of Moiré superconductivity and application of the Roeser-Huber formula
- 2023The Paramagnetic Meissner Effect (PME) in Metallic Superconductorscitations
- 2022Microstructural Parameters for Modelling of Superconducting Foamscitations
- 2022Superconductivity 2022
- 2021Microstructure analysis of electrospun La0.8Sr0.2MnO3 nanowires using electron microscopy and electron backscatter diffraction (EBSD)
- 2021Magnetic phases in superconducting, polycrystalline bulk FeSe samples
- 2021Magnetic phases in superconducting, polycrystalline bulk FeSe samplescitations
- 2020On the origin of the sharp, low-field pinning force peaks in MgB2 superconductorscitations
- 2020Magnetic phases in superconducting, polycrystalline bulk FeSe samples
- 2020Microstructure and Fluctuation-Induced Conductivity Analysis of Bi2Sr2CaCu2O8+δ (Bi-2212) Nanowire Fabrics
- 2020Relation between crystal structure and transition temperature of superconducting metals and alloys
- 2020Microstructure and paramagnetic Meissner effect of YBa2Cu3Oy nanowire networkscitations
- 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
- 2018Giant Enhancement of Magnetostrictive Response in Directionally-Solidified Fe83Ga17Erx Compounds
- 2013Microstructural Analysis of Electrochemical Coated Open-Cell Metal Foams by EBSD and Nanoindentationcitations
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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.