INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
High Anisotropic Critical Current Densities in MgB2 Tapes
Autor/es:
G. SERRANO; A. SERQUIS; L. CIVALE; B. MAIOROV; M. T. MALACHEVSKY
Revista:
Journal of Physics: Conference Series
Editorial:
IOP
Referencias:
Año: 2008
ISSN:
1742-6596
Resumen:
We present a study on the angular dependence of the critical current density (Jc) of SiCdopedMgB2 tapes fabricated by powder-in tube (PIT) with stainless steel (SS) as sheath material.The microstructure and texturing of the tapes are analysed to understand the effects of the rollingdegree on the superconducting properties. The microstructure is studied by x-ray diffraction andscanning electron microscopy, while Jc is measured by transport in liquid He and Ne. We foundthat for Si-doped tapes the alignment degree augmented with increasing deformation but tends tosaturate for aspect ratios larger than 5, while the anisotropy factor JAF=Jc(90°)/Jc(0°) continuedincreasing for larger aspect ratios. This increase is attributed to a pinning decrease for the appliedfield parallel to the tape direction. Very high Jc values were obtained for Si-doped tapes, whosecores are as dense as those from wires processed using hot isostatic pressing (HIPing) byoptimizing the rolling degree.