Title :
Large single grain (RE)-Ba-Cu-O superconductors with nano-phase inclusions
Author :
Babu, N. Hari ; Reddy, E.S. ; Shi, Y. ; Iida, K. ; Withnell, T.D. ; Cardwell, D.A.
Author_Institution :
Eng. Dept., Univ. of Cambridge, UK
fDate :
6/1/2005 12:00:00 AM
Abstract :
Nano-phase (5-20 nm) particles of YBa2(Cu0.5M0.5)O6 [where M=Nb, Ta, Mo, W, Zr and Hf] have been introduced successfully into RE-Ba-Cu-O single grain superconductors. A study to enlarge the size of a single grain containing these particles has been carried out involving measurement of the growth rate as a function of YBa2(Cu0.5M0.5)O6 phase concentration and degree of undercooling. The influence of the change in YBa2(Cu0.5M0.5)O6 concentration on microstructural features is also investigated and the superconducting properties of these large grain superconductors are presented.
Keywords :
barium compounds; flux pinning; granular superconductors; high-temperature superconductors; inclusions; nanoparticles; rare earth compounds; 5 to 20 nm; YBa2(Cu0.5Hf0.5)O6; YBa2(Cu0.5Mo0.5)O6; YBa2(Cu0.5Nb0.5)O6; YBa2(Cu0.5Ta0.5)O6; YBa2(Cu0.5W0.5)O6; YBa2(Cu0.5Zr0.5)O6; flux pinning centers; growth rate; large grain superconductors; materials processing; nanoparticles; nanophase inclusions; phase concentration; single grain superconductors; superconducting materials; Flux pinning; Grain size; Hafnium; High temperature superconductors; Microstructure; Powders; Solid state circuits; Superconductivity; Yttrium barium copper oxide; Zirconium; Flux pinning centers; materials processing; nano particles; superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848965
