Study of (Nd,Sm)422 solid solution and its effect on the melt process of Nd123 bulk superconductors

J. Yoshioka; K. Iida; M. Murakami

doi:10.1016/S0921-4534(01)00140-X

Study of (Nd,Sm)422 solid solution and its effect on the melt process of Nd123 bulk superconductors

J. Yoshioka, K. Iida, M. Murakami

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We have studied the range of Nd-Sm solid solution in the (Nd_1-x,Sm_x)_4-2yBa_2+2y Cu_2-yO_z system in the Nd123 matrix. X-ray diffraction studies for the sintered (Nd_1-x,Sm_x)_4-2yBa_2+2y Cu_2-yO_z 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 (Nd_1-x,Sm_x)_3.6Ba_2.4 Cu_1.8O_z. We then fabricated Nd123/Nd422 bulk superconductors by melt processing, in which Nd123 powder is mixed with 20 mol% (Nd_0.8,Sm_0.2)_3.6Ba_2.4 Cu_1.8O_z and 1 wt.% CeO₂. The sample exhibited high T_c of 97 K and sharp superconducting transition when melt-processed under controlled oxygen partial pressure (P_O2) of 0.01 atm.

Original language	English
Pages (from-to)	401-405
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	354
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(01)00140-X
Publication status	Published - 2001 May 1
Externally published	Yes

Keywords

Critical current density
Nd-Sm solid solution
Nd123
Nd422
Transition temperature

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Study of (Nd,Sm)422 solid solution and its effect on the melt process of Nd123 bulk superconductors",

abstract = "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.",

keywords = "Critical current density, Nd-Sm solid solution, Nd123, Nd422, Transition temperature",

author = "J. Yoshioka and K. Iida and M. Murakami",

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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.

PY - 2001/5/1

Y1 - 2001/5/1

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

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