Physics – Condensed Matter – Superconductivity
Scientific paper
2002-03-27
Physics
Condensed Matter
Superconductivity
23 pages, 9 figures
Scientific paper
The influence of the initial MgB2 grain size on critical current density, upper critical fields and irreversibility has been studied on Fe sheathed monofilamentary MgB2 tapes prepared by the Powder-In-Tube technique. The effect of the reduction of MgB2 grain size by ball milling was mainly to enhance both the critical current density, jc, and the irreversibility field, while the upper critical field remained unchanged. The anisotropy ratio of the upper critical field between magnetic fields parallel and perpendicular the tape surface was determined to 1.3, reflecting a deformation induced texture. A good agreement has been found between resistive and inductive jc values, measured at various temperatures. At 25K and 1 T, jc values close to 105 A/cm2 were measured. The exponential n factor of the resistive transition was found to be quite high at low fields, and decrease linearly from 60 at 4T to 10 at 8.5T.
Beneduce Concetta
Flukiger Rene
Musolino Nicolas
Suo H. L.
Toulemonde Pierre
No associations
LandOfFree
Transport critical current, anisotropy, irreversibility fields and exponential n factors in Fe sheathed MgB2 tapes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Transport critical current, anisotropy, irreversibility fields and exponential n factors in Fe sheathed MgB2 tapes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transport critical current, anisotropy, irreversibility fields and exponential n factors in Fe sheathed MgB2 tapes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-237841