Reference : Intragranular and intergranular superconducting properties of bulk melt-textured YBCO
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Engineering, computing & technology : Electrical & electronics engineering
Intragranular and intergranular superconducting properties of bulk melt-textured YBCO
Vanderbemden, Philippe mailto [Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Cloots, Rudi [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale - Doyen de la Faculté des Sciences >]
Ausloos, Marcel [Université de Liège - ULiège > Département de physique > Physique statistique appliquée et des matériaux - S.U.P.R.A.S. >]
Doyle, R. A. [> > > >]
Bradley, A. D. [> > > >]
Lo, W. [> > > >]
Cardwell, D. A. [> > > >]
Campbell, A. M. [> > > >]
IEEE Transactions on Applied Superconductivity
Yes (verified by ORBi)
New York
[en] critical current ; high-Tc superconductors ; grain boundaries
[en] We have investigated the superconducting properties of bulk melt-processed YBCO using different experimental techniques. First, single domain materials (i.e. containing no grain boundaries) have been studied. Electrical resistivity, current-voltage characteristics, M-H loops, and A,C. susceptibility. have been measured for different field and current directions. The intragranular properties are characteristic of high-quality melt-processed YBCO material,,vith a critical current density J(c)(T=77K, B=1T//c) > 10(4) A/cm(2). The anisotropy ratio J(c)(ab)/ J(c)(c) is found to be close to 3. Both magnetic and transport measurements show that defects in the microstructure do not significantly impede the current flow inside the single domain. These results were compared to those measured on samples containing one "natural" single grain boundary which sometimes appears during the grain growth process. The intergranular properties show a much stronger current and magnetic field dependence than that measured within the grain and these differences are discussed.
Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Communauté française de Belgique - CfB
Researchers ; Professionals
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