Title :
Anisotropy of Jc in ex situ MgB2/Fe monofilamentary tapes
Author :
Lezza, Paola ; Gladyshevskii, Roman ; Senatore, Carmine ; Cusanelli, Giuseppe ; Suo, Hongli ; Flükiger, René
Author_Institution :
Group of Appl. Phys., Univ. of Geneva, Switzerland
fDate :
6/1/2005 12:00:00 AM
Abstract :
The anisotropy of the critical current density of Fe-sheathed ex situ MgB2 monofilamentary tapes has been measured at various magnetic fields and temperatures and has been found to be influenced by the particle size of the starting material. Already reacted powders were milled in order to obtain different starting particle sizes. In order to understand the origin of the anisotropy, we have undertaken an X-ray study on the degree of texturing in the filaments after mechanical removal of the Fe sheath. The degree of texturing of the filaments at the interface Fe/MgB2 and at the center of the filaments has been determined. A moderate texture has been found, being slightly higher at the interface.
Keywords :
composite superconductors; critical current density (superconductivity); iron; magnesium compounds; particle size; powder technology; superconducting tapes; texture; MgB2-Fe; anisotropy; critical current density; monofilamentary tapes; particle size; powders; Anisotropic magnetoresistance; Critical current density; Current measurement; Density measurement; Iron; Magnetic field measurement; Magnetic materials; Particle measurements; Size measurement; Temperature; Critical current density; critical current density anisotropy; ex situ tapes;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848789
