Influence of Oxygen and Boron Distribution on the Superconducting Characteristics of Nanostructural Mg-B-O Ceramics
| Autor: | Viktor Moshchil, Tatiana Prikhna, T. Habisreuther, Valeriy Kovylaev, V. B. Sverdun, Artem Kozyrev, Michael Eisterer, H. W. Weber, A. V. Shaternik, Myroslav Karpets, Alexandr Borimskiy, Xavier Chaud, Wolfgang Gawalek, Tetyana Basyuk |
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| Přispěvatelé: | Centre National de la Recherche Scientifique (CNRS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2013 |
| Předmět: |
010302 applied physics
Superconductivity Materials science Condensed matter physics chemistry.chemical_element Condensed Matter Physics 01 natural sciences Oxygen Atomic and Molecular Physics and Optics Magnetic field chemistry.chemical_compound Distribution (mathematics) chemistry [PHYS.HIST]Physics [physics]/Physics archives visual_art 0103 physical sciences visual_art.visual_art_medium Silicon carbide General Materials Science Ceramic 010306 general physics Boron Pinning force ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Solid State Phenomena Solid State Phenomena, Trans Tech Publications Ltd 2013, 200, pp.137-143. ⟨10.4028/www.scientific.net/SSP.200.137⟩ |
| ISSN: | 1662-9779 0377-6883 |
| Popis: | The superconducting characteristics, such as the critical current density and the critical magnetic fields, of MgB2-based materials, which in fact belong to the Mg-B-O system because of the high concentration of admixed oxygen (up to 17 wt. %), depend on the inhomogeneity of the oxygen and boron distribution, which can be controlled by the synthesis temperature (600-1200 oC) and pressure (up to 2 GPa) as well as by SiC and Ti additions (10 wt%). With increasing manufacturing temperature grain boundary pinning transforms into point pinning, which is well correlated with the transformation of discontinuous oxygen enriched layers into separately located Mg-B-O inclusions in the MgB2 nanostructure and with a reduction of the size and amount of inclusions of higher magnesium borides MgBX (X>2). Ti or SiC additions can influence the oxygen and boron distribution as SEM and Auger structural studies showed. |
| Databáze: | OpenAIRE |
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