Title :
Flux Pinning Characteristics of Artificial Pinning Centers With Different Dimension
Author :
Matsumoto, Kaname ; Mele, Paolo ; Ichinose, Ataru ; Mukaida, Masashi ; Yoshida, Yutaka ; Horii, Shigeru ; Kita, Ryusuke
Author_Institution :
Dept. of Mater. Sci. & Eng., Kyushu Inst. of Technol., Kitakyushu, Japan
fDate :
6/1/2009 12:00:00 AM
Abstract :
The crystal defects of the nano-scale, which are called artificial pinning centers (APCs), were successfully introduced into high-temperature superconductors (HTS) by nanotechnology, in order to strongly pin the quantized vortices. Critical current densities Jc of the HTS films were dramatically improved by APCs whose dimensions were controlled. By this method, the in-field Jc (77 K) of the high-quality, epitaxial films was improved by one order of magnitude or more compared with the values of the past. A current outline of the research is described in this paper.
Keywords :
barium compounds; critical current density (superconductivity); flux pinning; grain boundaries; high-temperature superconductors; nanotechnology; pulsed laser deposition; superconducting epitaxial layers; yttrium compounds; YBa2Cu3O7-delta; artificial pinning centers; critical current density; flux pinning characteristics; grain boundaries; high-temperature superconductor epitaxial films; nanoscale crystal defects; nanotechnology; pulsed laser deposition; quantized vortices; temperature 77 K; High-temperature superconductor; nanotechnology; superconducting films; superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2018186
