Synthesis of superconductor Bi‐2223 and its properties after partial oxygen substitution

Autor:	V. Jakeš, D. Sykorova, O. Smrčková, P. Vasek
Rok vydání:	2006
Předmět:	Superconductivity Work (thermodynamics) Condensed matter physics Electrical resistance and conductance Chemistry Phase (matter) Doping Fluorine Analytical chemistry chemistry.chemical_element Condensed Matter Physics Stoichiometry Partial oxygen
Zdroj:	physica status solidi c. 3:3077-3080
ISSN:	1610-1642 1862-6351
DOI:	10.1002/pssc.200567042
Popis:	In the first part of the work two routes of preparation of undoped superconductor Bi-2223 are compared. The influence of addition of extra PbO is studied as well. The route that leads to higher content of the phase 2223 is then chosen as the appropriate way for preparation of fluorine doped samples of general stoichiometry Bi1.6Pb0.4Sr2Ca2.5Cu3.5Ox–z Fz (z = 0, 0.3, 0.6 and 0.9). These samples are characterized by measuring of their temperature dependence of electrical resistance and critical current density. Their phase composition is determined by XRD. While greater amount of fluorine widenes the superconducting transition and worsenes transport properties, the less doped sample shows increasement of critical current density. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze:	OpenAIRE
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