Title :
Melt-processed RE-Ba-Cu-O (RE=Sm, Nd) superconductors for quasi-permanent magnets
Author :
Ikuta, Hiroshi ; Hosokawa, Tetsuhiro ; Ishihara, Hiromasa ; Yoshikawa, Masaaki ; Yanagi, Yousuke ; Itoh, Yoshitaka ; Oka, Tetsuo ; Mizutani, Uichiro
Author_Institution :
Integrated Res. in Sci. & Eng., Nagoya Univ., Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
The microstructures of melt-processed Nd-BCO/Ag samples were investigated. A rather homogeneous distribution of Nd422 particles was found, which can be attributed to the fast growing speed of NdBCO and the large size of Nd422 particles. The dispersion of Ag depended on the content of Ag2O, and the phase relation of the Nd-BCO/Ag system is discussed. We also studied the pulsed field magnetization technique, and found that the amount of magnetic fluxes trapped by SmBCO significantly increased by sandwiching the sample with ferromagnetic yokes and repeatedly applying magnetic pulses with decreasing amplitude
Keywords :
barium compounds; crystal microstructure; flux pinning; high-temperature superconductors; magnetisation; melt texturing; neodymium compounds; permanent magnets; samarium compounds; silver; Ag; Ag2O; Nd-BCO/Ag system; Nd422 particles; NdBaCuO; SmBaCuO; fast growing speed; ferromagnetic yokes; homogeneous distribution; magnetic flux; magnetic pulses; melt-processed Nd-BCO/Ag samples; melt-processed RE-Ba-Cu-O; microstructure; phase relation; pulsed field magnetization; quasi-permanent magnets; sandwiching; superconductors; Crystalline materials; High temperature superconductors; Magnetic fields; Magnetic flux; Magnetic materials; Magnetization; Neodymium; Superconducting magnets; Superconductivity; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
