http://www.cnr.it/ontology/cnr/individuo/prodotto/ID178475

A study of coupling loss on bi-columnar BSCCO/Ag tapes through ac susceptibility measurements (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

A study of coupling loss on bi-columnar BSCCO/Ag tapes through ac susceptibility measurements (Articolo in rivista) (literal)

Anno

2004-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1088/0953-2048/17/3/033 (literal)

Alternative label

D Zola; F Gömöry; M Polichetti; F Strý?ek; E Seiler; I Hu?ek; P Ková?; S Pace (2004)
A study of coupling loss on bi-columnar BSCCO/Ag tapes through ac susceptibility measurements
in Superconductor science and technology (Print); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

D Zola; F Gömöry; M Polichetti; F Strý?ek; E Seiler; I Hu?ek; P Ková?; S Pace (literal)

Pagina inizio

501 (literal)

Pagina fine

511 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://iopscience.iop.org/0953-2048/17/3/033/ (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

17 (literal)

Rivista

Superconductor science and technology (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

11 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

3 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

- Univ Salerno, SUPERMAT, INFM Reg Lab, I-84081 Baronissi, Italy - Univ Salerno, Dept Phys ER Caianiello, I-84081 Baronissi, Italy - Slovak Acad Sci, Inst Elect Engn, Bratislava 84239, Slovakia (literal)

Titolo

A study of coupling loss on bi-columnar BSCCO/Ag tapes through ac susceptibility measurements (literal)

Abstract

Coupling losses were studied in composite tapes containing superconducting material in the form of two separate stacks of densely packed filaments embedded in a metallic matrix of Ag or Ag alloy. This kind of sample geometry is quite favourable for studying the coupling currents and, in particular, the role of superconducting bridges between filaments. By using the ac susceptibility technique, the electromagnetic losses as a function of ac magnetic field amplitude and frequency were measured at the temperature T = 77 K for two tapes with different matrix composition. The length of the tapes was varied by subsequent cutting in order to investigate its influence on the dynamics of magnetic flux penetration. The geometrical factor ?0 which takes into account the demagnetizing effects was established from ac susceptibility data at low amplitudes. Losses versus frequency dependencies have been found to agree nicely with the theoretical model developed for round multifilamentary wires. Applying this model, the effective resistivity of the matrix was determined for each tape by using only measured quantities. For the tape with a pure silver matrix its value was found to be larger than that predicted by the theory for given metal resistivity and filamentary architecture. In contrast, in the tape with a Ag/Mg alloy matrix, an effective resistivity much lower than expected was determined. We explain these discrepancies by taking into account the quality of the interface between the superconducting filaments and the normal matrix. In the case of a soft matrix of pure Ag, this is of poor quality, while the properties of the alloy matrix seem to provoke the extensive creation of intergrowths which can be actually observed in these kind of tapes. (literal)

Editore