INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Single-wall carbon nanotubes addition effects on the superconducting properties of MgB2
Autor/es:
G. SERRANO; A. SERQUIS; L. CIVALE; B. MAIOROV; T. G. HOLESINGER; F. BALAKIREV; M. JAIME
Revista:
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Editorial:
WORLD SCIENTIFIC PUBL CO PTE LTD
Referencias:
Año: 2009 vol. 17 p. 3465 - 3469
ISSN:
0217-9792
Resumen:
In this work we describe the effects of adding different amount of single-wall (sw) carbon nanotubes (CNT) on the superconducting properties of MgB2. We observed that the amount of swCNT that partially dilute into the MgB2 matrix is lower than for double-wall (dw) CNT samples for the same nominal contenl. This C incorporation leads to an in crease of the upper critical field (Hc2), with a maximum Hc2(O) extrapolated value of 33.5 T, expected for a two-gap superconductor in the dirty limit. At the same time, the fraction of swCNT that has not been incorporated into MgB2 lattice may retain their structural integrity acting as strong vortex pinning centers. In this case the optimum nominal swCNT content for increasing critical current density (Jc) is in the range 7.5-1O%at.
