Abstract
The effect of Zr and Sn addition on the critical current density (J c) and the microstructure of filamentary SmBa 2Cu 3O y (Sm123) has been investigated. Samples with additions fabricated by a solution spinning method were partially melted under an atmosphere gas containing 0.1-3.0% O 2. After heat-treatment, homogeneous dispersion of fine Sm 2BaCuO 5 (Sm211) particles was observed in the Zr-doped sample. The 0.2 at% Zr-doped Sm123 showed the depressed J c value of 1.8 × 10 4A/cm 2 at 77 K and self-field compared with the undoped sample. From the J c measurement in magnetic fields, J c value higher than 10 3A/cm 2 at 77 K was maintained up to 8 T. On the other hand, 0.2 at% Sn-added sample showed high J c value of 5.0× 10 4 A/cm 2 at 77 K and self-field, and the J c value higher than 10 3A/cm 2 is maintained up to 17 T. A small amount of Sn doping was found to be effective in increasing the J c under high magnetic field and the irreversibility field of Sm123 filaments.
Original language | English |
---|---|
Article number | 6104371 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 22 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- Chemical metal doping
- Sm-Ba-Cu-O filaments
- critical current density
- magnetic field behavior
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering