Introduction of pinning centres in Tl-based 1212 and 1223 superconductors: bulk and thin films
- 1 September 1991
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 4 (9) , 488-490
- https://doi.org/10.1088/0953-2048/4/9/031
Abstract
Introduction of pinning centres into high temperature superconductors is prerequisite to obtain a high critical current density (Jc) in magnetic fields. A process called melt-assisted pinning was developed to introduce pinning centres into Tl-based superconductors, the (1223) and (1212) phase of Tl-Sr-Ca-Cu-O system. The nominal composition is (Tl0.5Pb0.5)(Sr0.8Ba0.2)2Ca2Cu3O9. The intragrain Jc measured from magnetization was found to be 2*104 A/cm2 at 77 K and 1 tesla. Thin films of Tl-(1212) and Tl-(1223) were also prepared by the laser ablation method. It is emphasized that pinning centres was introduced more easily into the Tl-(1223) phase than into the Tl-(2223) phase of the Tl-Ba-Ca-Cu-O system.Keywords
This publication has 8 references indexed in Scilit:
- Influence of the Flux Creep on the Critical Current Density in Bi2Sr2Ca2Cu3Ox and Y(Ho)Ba2Cu3Oy SuperconductorsJapanese Journal of Applied Physics, 1990
- Rietveld Refinement of the Structure of TlSr2CaCu2O7 by X-Ray Powder Diffraction DataJapanese Journal of Applied Physics, 1990
- Relationship between Crystal Structures and Solid Solution of Tl-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O SuperconductorsJapanese Journal of Applied Physics, 1989
- Microstructural Study of the Y-Ba-Cu-O System at High TemperaturesJapanese Journal of Applied Physics, 1989
- Superconductivity of Tl-Sr-Ca-Cu-O System in Relation to Tl-Ba-Ca-Cu-O and Bi-Sr-Ca-Cu-O SystemsJapanese Journal of Applied Physics, 1988
- High critical currents in Y-Ba-Cu-O superconductorsApplied Physics Letters, 1988
- Superconductivity in Tl1.5SrCaCu2OxJapanese Journal of Applied Physics, 1988
- Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O systemNature, 1988