TY - JOUR
T1 - Infiltration growth processing of single grain (Gd,Dy)BCO bulk superconductors
T2 - Optimization of liquid phase mass and characterization of physical properties
AU - Pavan Kumar Naik, S.
AU - Miryala, Muralidhar
AU - Takemura, Kento
AU - Jirsa, Milos
AU - Murakami, Masato
PY - 2019/3/7
Y1 - 2019/3/7
N2 -
Infiltration of an optimal amount of liquid (Ba
3
Cu
5
O
8
denoted further as "035") for efficient peritectic growth is a primary requirement in the infiltration growth (IG) processing of high-quality REBa
2
Cu
3
O
7-δ
products. Recently, we optimized the Dy content and the time-temperature schedules for top-seeded IG processing of (Gd,Dy)Ba
2
Cu
3
O
7-δ
[(Gd,Dy)BCO] single grain superconductors. Aiming to fabricate larger sized (Gd,Dy)BCO (80 wt. % Gd
2
BaCuO
5
and 20 wt. % of Dy
2
BaCuO
5
) single grain bulk superconductors, different liquid phase [LP = ErBa
2
Cu
3
O
7-δ
(Er-123) and mixed with 035] sources were employed and the LP content was optimized by varying its mass. The increase in Er-123+035 mass assured an abundant amount of liquids for peritectic reaction. The Er-123+035 ratio of 1:1.4 was found to be optimum. The optimized liquid phase infiltration enabled an effective control of (Gd,Dy)
2
BaCuO
5
(211) secondary phase size and content in final microstructures. Bulk single-grain (Gd,Dy)BCO superconductors were fabricated by the top-seeded IG process with an LP mass of 1 and 1.4 wt. %. A fully grown single grain bulk (Gd,Dy)BCO superconductor was attained. The sufficient LP infiltration resulted in a greatly improved critical current and trapped field performance. Scaling of bulk volume flux pinning force was studied with the aim of identifying flux pinning mechanisms effectively occurring in the material.
AB -
Infiltration of an optimal amount of liquid (Ba
3
Cu
5
O
8
denoted further as "035") for efficient peritectic growth is a primary requirement in the infiltration growth (IG) processing of high-quality REBa
2
Cu
3
O
7-δ
products. Recently, we optimized the Dy content and the time-temperature schedules for top-seeded IG processing of (Gd,Dy)Ba
2
Cu
3
O
7-δ
[(Gd,Dy)BCO] single grain superconductors. Aiming to fabricate larger sized (Gd,Dy)BCO (80 wt. % Gd
2
BaCuO
5
and 20 wt. % of Dy
2
BaCuO
5
) single grain bulk superconductors, different liquid phase [LP = ErBa
2
Cu
3
O
7-δ
(Er-123) and mixed with 035] sources were employed and the LP content was optimized by varying its mass. The increase in Er-123+035 mass assured an abundant amount of liquids for peritectic reaction. The Er-123+035 ratio of 1:1.4 was found to be optimum. The optimized liquid phase infiltration enabled an effective control of (Gd,Dy)
2
BaCuO
5
(211) secondary phase size and content in final microstructures. Bulk single-grain (Gd,Dy)BCO superconductors were fabricated by the top-seeded IG process with an LP mass of 1 and 1.4 wt. %. A fully grown single grain bulk (Gd,Dy)BCO superconductor was attained. The sufficient LP infiltration resulted in a greatly improved critical current and trapped field performance. Scaling of bulk volume flux pinning force was studied with the aim of identifying flux pinning mechanisms effectively occurring in the material.
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U2 - 10.1063/1.5082665
DO - 10.1063/1.5082665
M3 - Article
AN - SCOPUS:85062717083
VL - 125
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 9
M1 - 093907
ER -