TY - JOUR
T1 - Top-seeded infiltration growth of (Y, Gd)Ba2Cu3Oy bulk superconductors with high critical current densities
AU - Das, Dhruba
AU - Muralidhar, M.
AU - Rao, M. S.Ramachandra
AU - Murakami, Masato
N1 - Funding Information:
This work was supported by Japan Student Services Organization (JASSO), Shibaura Institute of Technology (SIT) under the Top Global University Project, Designed by Ministry of Education, Culture, Sports, Science & Technology in Japan.
Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/9/15
Y1 - 2017/9/15
N2 - We employed the top-seeded infiltration-growth (IG) process for the fabrication of bulk (Y, Gd)Ba2Cu3Oy (YG-123) superconductors by varying the composition of (Y, Gd)2BaCuO5 (YG-211) and compared with bulk YBa2Cu3Oy (Y-123) superconductors grown under similar conditions. IG-processed YG-123 exhibited Jc (77 K) of 4.78 × 104 A cm-2 in zero field, which was higher than the value of 3.71 × 104 A cm-2 for Y-123. The superconducting transition temperature (Tc) of YG-123 increased with increasing Gd content. However, there was spatial variation in the superconducting properties of IG-processed YG-123 samples due to the inhomogeneous distribution of YG-211. Jc values of YG-123 decreased when increasing the distance from the seed both along the a and c-axis directions. The scaling studies of the pinning behavior for YG-123 showed that non-superconducting YG-211 particles act as effective pinning centers, supported by the fact that δTc type pinning is active in the system.
AB - We employed the top-seeded infiltration-growth (IG) process for the fabrication of bulk (Y, Gd)Ba2Cu3Oy (YG-123) superconductors by varying the composition of (Y, Gd)2BaCuO5 (YG-211) and compared with bulk YBa2Cu3Oy (Y-123) superconductors grown under similar conditions. IG-processed YG-123 exhibited Jc (77 K) of 4.78 × 104 A cm-2 in zero field, which was higher than the value of 3.71 × 104 A cm-2 for Y-123. The superconducting transition temperature (Tc) of YG-123 increased with increasing Gd content. However, there was spatial variation in the superconducting properties of IG-processed YG-123 samples due to the inhomogeneous distribution of YG-211. Jc values of YG-123 decreased when increasing the distance from the seed both along the a and c-axis directions. The scaling studies of the pinning behavior for YG-123 showed that non-superconducting YG-211 particles act as effective pinning centers, supported by the fact that δTc type pinning is active in the system.
KW - critical current density
KW - microstructure
KW - pinning
KW - top-seeded infiltration growth
KW - transition temperature
KW - volume fraction
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U2 - 10.1088/1361-6668/aa83da
DO - 10.1088/1361-6668/aa83da
M3 - Article
AN - SCOPUS:85032972950
SN - 0953-2048
VL - 30
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 10
M1 - 105015
ER -