TY - JOUR
T1 - Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors
AU - Yamada, T.
AU - Ikuta, H.
AU - Yoshikawa, M.
AU - Yanagi, Y.
AU - Itoh, Y.
AU - Oka, T.
AU - Mizutani, U.
N1 - Funding Information:
This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by the Iwatani Naoji Foundation's Research Grant.
PY - 2002/10/1
Y1 - 2002/10/1
N2 - We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.
AB - We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.
KW - Effect of Ag addition
KW - Melt-processed superconductor
KW - Oxygen diffusivity
KW - Sm-Ba-Cu-O
KW - Y-Ba-Cu-O
UR - http://www.scopus.com/inward/record.url?scp=0036789123&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036789123&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(02)01527-7
DO - 10.1016/S0921-4534(02)01527-7
M3 - Article
AN - SCOPUS:0036789123
SN - 0921-4534
VL - 378-381
SP - 713
EP - 717
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - PART 1
ER -