Naslov
Flux pinning in nanoparticle doped MgB2/Cu tapes

Autori
Babić, Emil ; Kušević, Ivica ; Husnjak, Ozren ; Soltanian, Saeid ; Wang, Xiao Lin ; Dou, Shi Xue

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
M2S-HTSC VIII Abstract Booklet / - Dresden, 2006, 102-102

Skup
8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors

Mjesto i datum
Dresden, Njemačka, 09.07.2006. - 14.07.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Superconductor; Irreversibility field; Critical current density; Nanostructured

Sažetak
The irreversibility fields Birr and critical current densities Jc of undoped and Si and SiC nanoparticle doped (5, 10 and 20 wt.%) MgB2 tapes were measured in the temperature (T) range 2-38 K and in magnetic fields B<=16 T. Whereas Birr of undoped tapes varies smoothly with T, those of doped tapes show a change in slope around a crossover field Bcr which increases with nanoparticle content and also depends on their type. This indicates matching effect in vortex pinning, probably associated with Mg2Si nanoprecipitates formed during heat treatment. Indeed, Birr of doped tapes was enhanced in respect to that of undoped one with the highest enhancement for Birr~Bcr, but the enhancement remained high ~1.4 even for Birr>>Bcr (low temperatures). The variations of Jc and the pinning force density Fp=JcB with B and T support the above findings.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA