TY - JOUR
T1 - Study of (Nd,Sm)422 solid solution and its effect on the melt process of Nd123 bulk superconductors
AU - Yoshioka, J.
AU - Iida, K.
AU - Murakami, M.
N1 - Funding Information:
This work is supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. J.Y. and K.I. are grateful to Iwate Techno Foundation for their financial support.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2001/5
Y1 - 2001/5
N2 - We have studied the range of Nd-Sm solid solution in the (Nd1-x,Smx)4-2yBa2+2y Cu2-yOz system in the Nd123 matrix. X-ray diffraction studies for the sintered (Nd1-x,Smx)4-2yBa2+2y Cu2-yOz powders in air showed that the samples were a single phase 422 in the range of x = 0-0.3, showing that Sm substituted on Nd site in Nd422. It was also found that Sm is soluble up to x = 0.3 in (Nd1-x,Smx)3.6Ba2.4 Cu1.8Oz. We then fabricated Nd123/Nd422 bulk superconductors by melt processing, in which Nd123 powder is mixed with 20 mol% (Nd0.8,Sm0.2)3.6Ba2.4 Cu1.8Oz and 1 wt.% CeO2. The sample exhibited high Tc of 97 K and sharp superconducting transition when melt-processed under controlled oxygen partial pressure (PO2) of 0.01 atm.
AB - We have studied the range of Nd-Sm solid solution in the (Nd1-x,Smx)4-2yBa2+2y Cu2-yOz system in the Nd123 matrix. X-ray diffraction studies for the sintered (Nd1-x,Smx)4-2yBa2+2y Cu2-yOz powders in air showed that the samples were a single phase 422 in the range of x = 0-0.3, showing that Sm substituted on Nd site in Nd422. It was also found that Sm is soluble up to x = 0.3 in (Nd1-x,Smx)3.6Ba2.4 Cu1.8Oz. We then fabricated Nd123/Nd422 bulk superconductors by melt processing, in which Nd123 powder is mixed with 20 mol% (Nd0.8,Sm0.2)3.6Ba2.4 Cu1.8Oz and 1 wt.% CeO2. The sample exhibited high Tc of 97 K and sharp superconducting transition when melt-processed under controlled oxygen partial pressure (PO2) of 0.01 atm.
KW - Critical current density
KW - Nd-Sm solid solution
KW - Nd123
KW - Nd422
KW - Transition temperature
UR - http://www.scopus.com/inward/record.url?scp=0035331148&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035331148&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00140-X
DO - 10.1016/S0921-4534(01)00140-X
M3 - Article
AN - SCOPUS:0035331148
VL - 354
SP - 401
EP - 405
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-4
ER -