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Pinning and trapped field in MgB2- and MT-YBaCuO bulk superconductors manufactured under pressure

Prikhna, T.; Eisterer, M.; Chaud, X.; Weber, H. W.; Habisreuther, T.; Moshchil, V.; Kozyrev, A.; Shapovalov, A.; Gawalek, W.; Wu, M.; Litzkendorf, D.; Goldacker, W. 1; Sokolovsky, V.; Shaternik, V.; Rabier, J.; Joulain, A.; Grechnev, G.; Boutko, V.; Gusev, A.; ... mehr

Abstract:

The relevant pinning centers of Abrikosov vortices in MgB2–based materials are oxygen-enriched Mg-B-O inclusions or nanolayers and inclusions of MgBx (x>4) phases. The high critical current densities, jc, of 106 and 103A/cm2 at 1 and 8.5 T, respectively, at 20 K can be achieved in polycrystalline materials (prepared at 2 GPa) containing a large amount of admixed oxygen. Besides, oxygen can be incorporated into the MgB2 structure in small amounts (MgB1.5O0.5), which is supported by Auger studies and calculations of the DOS and the binding energy. The jc of melt textured YBa2Cu3O7δ (or Y123)-based superconductors (MT-YBaCuO) depends not only on the perfectness of texture and the amount of oxygen in the Y123 structure, but also on the density of twins and micro-cracks formed during the oxygenation (due to shrinking of the c-lattice parameter). The density of twins and microcracks increases with the reduction of the distance between Y2BaCuO5 (Y211) inclusions in Y123. At 77 K jc=8⋅104 A/cm2 in self-field and jc=103 A/cm2 at 10 Т were found in materials oxygenated at 16 MPa for 3 days with a density of twins of 22–35 per μm (thickness of the lamellae: 45-30 nm) and a density of micro-cracks of 200–280 per mm. ... mehr

Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1742-6588, 1742-6596
urn:nbn:de:swb:90-681231
KITopen-ID: 1000068123
HGF-Programm 37.06.02 (POF III, LK 01) New Power Network Technology
Erschienen in Journal of physics / Conference Series
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 695
Heft 1
Seiten Art. Nr.: 012001
Nachgewiesen in Dimensions
OpenAlex
Scopus

Volltext §
DOI: 10.5445/IR/1000068123
Originalveröffentlichung
DOI: 10.1088/1742-6596/695/1/012001
Scopus
Zitationen: 1
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Zitationen: 1
Seitenaufrufe: 223
seit 06.05.2018
Downloads: 250
seit 20.08.2017
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