| 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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Douine, Bruno
Université de Lorraine
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (36/36 displayed)
- 2022Microstructural Parameters for Modelling of Superconducting Foamscitations
- 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
- 2020An Integro-Differential Time-Domain Scheme for Electromagnetic Field Modeling in HTS Materialscitations
- 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
- 2018Eddy current modeling in linear and nonlinear multifilamentary composite materialscitations
- 2018Distribution of current density, temperature and mechanical deformation in YBCO bulks under Field-Cooling magnetizationcitations
- 2017Electromagnetic field modeling in HTS composite tapes in the frequency domain
- 2017Dependence of the trapped magnetic flux density of YBCO pellets on mechanical stress
- 2017Eddy current modeling in composite materials: CFRPs and multifilamentary HTS tapes
- 2016Trapped Magnetic Field Experiments and Characterization of Large-Sized Bulk MgB2 Samples
- 2016Design of a Vector Magnet Generating up to 3 T with 3 Axis Orientation
- 2016Modelling of HTS bulk during Pulsed Field Magnetization within an iron core using analytical and integral methods
- 2016Design of a Vector Magnet Generating up to 3 T with 3 Axis Orientation
- 2016Eddy current modeling in multifilementary superconductive tapes submitted to external time varying magnetic field
- 2015Design of a Low-Temperature Superconducting coils system generating up to 3 T in a 10 cm bore diameter with 3 axis orientations
- 2015Design of a Low-Temperature Superconducting coils system generating up to 3 T in a 10 cm bore diameter with 3 axis orientations
- 2015Conception d'un aimant vectoriel supraconducteur produisant 3 T dans une sphère de diamètre 100 mm
- 2015Design of a vector magnet generating up to 3 T with 3 axis orientation
- 2014Critical current density determination of superconducting material
- 2012Modeling of a 3D superconducting inductor structure using analytical formulae
- 2011Determination of superconducting material critical current density from magnetic field diffusion measurement
- 2010JC(B) determination method with the help of the virgin magnetization curve of a superconducting cylindercitations
- 2008Self Field Effect Compensation in an HTS Tubecitations
- 2007Influence of Temperature and/or Field Dependences of the E−J Power Law on Trapped Magnetic Field in Bulk YBaCuOcitations
- 2006Influence of Jc(B) on the full penetration current of superconducting tubecitations
- 2005Pulse field magnetization of high-temperature superconductor bulk parts considering thermal effects
- 2003Calculation of losses in a HTS current lead with the help of the dimensional analysis
Places of action
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conferencepaper
Magnetic phases in superconducting, polycrystalline bulk FeSe samples
Abstract
International audience ; For possible applications as trapped field (TF) magnets, it is essential to fabricate large, polycrystalline bulk samples from the FeSe compound, the simplest high-Tc superconductor (HTSc) possible. FeSe is relatively cheap to prepare, and does not contain any rare-earth material. The grain boundaries in this compound are not acting as weak links as it is the case for the YBCO compound. Although the transition temperature, Tc, is just below 10 K, the upper critical fields are comparable with other HTSc. Preparing the FeSe samples using solid-state sintering yields samples exhibiting strong magnetic hysteresis loops (MHLs), and the superconducting contribution is only visible after subtracting MHLs from above Tc. Due to the complicated phase diagram [1], the samples are a mixture of several phases, α-FeSe, β-FeSe, δ-FeSe (Fe7Se8) and metallic α-Fe [2]. The amount of the latter two phases depends directly on the Se loss during the sintering process. The δ-FeSe is antiferromagnetic, and α-Fe is ferromagnetic [3]. In the present contribution, we show MHLs of a variety of samples measured up to ±7 T and determine the magnetic characteristics, together with the amount of superconductivity determined from M(T) measurements. We performed a thorough analysis of the microstructures using polarization microscopy, Kerr effect, MFM, SEM, EBSD and TEM in order to establish a relation between microstructure and sample properties. To prepare good superconducting samples, the presence of the (anti)ferromagnetic phases must be reduced by carefully adjusting the Se content using Ti foils as getter materials. Measuring magnetoresistance of these samples [4] implies that the samples are always cooled in the own local field, and thus, the analysis of the resistance data calculating the fluctuation-induced conductivity above Tc [5] is strongly affected by this local magnetic field. We demonstrate the importance of preparing phase-pure FeSe samples, which are essential for the various applications envisaged. ...