Critical current anisotropy of Tl-1223 superconductors

✍ Scribed by B.A. Glowacki

• Book ID: 104111326
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 682 KB
• Volume: 37
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(97)00053-2

✦ Synopsis

A comparative study of the critical current anisotropy in low magnetic fields of Tl-1223 conductors manufactured by different techniques, prepared from different compositions and originating from different research laboratories is presented and discussed. For highly oriented layers, with the magnetic field (B) parallel to the ab-plane, the normalized critical current density (j) versus magnetic field characteristic shows very little drop of jvalue due to the intrinsic properties of the TI-1223 phase, while all powder-in-tube conductors show a rapid drop of j value in fields as low as IO mT. For all powder-in-tube conductors, the anisotropy coefficient shows a very pronounced minimum at fields up to 30 mT, followed by a monotonic decrease of anisotropy with increase of the magnetic field. This is due to poor grain alignment and a demagnetizing effect in the powder-in-tube TI-1223 tapes.