Pregled bibliografske jedinice broj: 170759
Vortex pinning by correlated disorder in nanoparticle doped MgB2
Vortex pinning by correlated disorder in nanoparticle doped MgB2 // The 20th General Conference of the Condensed Matter Division European Physical Society/ Book of abstracts
Prag, 2004. str. 194-194 (poster, nije recenziran, sažetak, znanstveni)
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Naslov
Vortex pinning by correlated disorder in nanoparticle doped MgB2
Autori
Kušević, Ivica ; Babić, Emil ; Husnjak, Ozren ; Soltanian, Saeid ; Wang, Xiaolin ; Delfany, Mino ; Dou, Shi Xue
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
The 20th General Conference of the Condensed Matter Division European Physical Society/ Book of abstracts
/ - Prag, 2004, 194-194
Skup
The 20th General Conference of the Condensed Matter Division European Physical Society
Mjesto i datum
Prag, Češka Republika, 19.07.2004. - 23.07.2004
Vrsta sudjelovanja
Poster
Vrsta recenzije
Nije recenziran
Ključne riječi
vortex; correlated disorder; nanoparticle doped; MgB2; magnetoresistivity; critical current density
Sažetak
Magnetoresistivity and critical current density were measured on five Si-nanoparticle doped (c<=10 wt.%) and undoped Cu-sheathed MgB2 tapes and wires for temperatures T>=28 K in magnetic fields B<=0.95 T. Unlike the irreversibility lines Birr(T) for undoped samples (smooth lines), Birr(T) for doped samples shows a change in slope which is typical for high-temperature superconductors (HTS) with correlated disorder. Microstructural studies of nanoparticle doped MgB2 show uniforlmy dispersed Mg2Si nanopercipitates which probably act as a correlated disorder (Bphi is the matching field). But, in contrast to HTS, in nanoparticle doped MgB2 the enhancement of Birr (with respect to undoped one) persists at all field scales (including B>>Bphi).
Izvorni jezik
Engleski
Znanstvena područja
Fizika
