Effect of mixing three rare-earth elements on the superconducting properties of REBa2Cu3Oy

M. Muralidhar; H. S. Chauhan; T. Saitoh; K. Kamada; K. Segawa; M. Murakami

doi:10.1088/0953-2048/10/9/006

Effect of mixing three rare-earth elements on the superconducting properties of REBa₂Cu₃O_y

M. Muralidhar, H. S. Chauhan, T. Saitoh, K. Kamada, K. Segawa, M. Murakami

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

104 Citations (Scopus)

Abstract

We report the effect of mixing three rare-earth (RE) elements in the RE site on the superconducting properties of melt-processed REBa₂Cu₃O_y, in which RE elements are selected from the group of Nd, Sm, Eu and Gd. The heat treatment profiles for melt processing were determined according to the peritectic decomposition temperatures obtained from the thermal analysis measurements. Microstructural observations and compositional analysis showed that the main phase was (R1_0.33R2_0.33R3_0.33)Ba₂Cu ₃O_y, in which the ratio of three RE elements (R1, R2, R3) was equal to that of the nominal composition, indicating that mixing of RE elements was uniform. All the samples showed relatively high T_c in the range 93.1-95.3 K and exhibited the secondary peak effect in the magnetization curves at 77 K with the irreversibility field higher than that of melt-processed Y-Ba-Cu-O. A high J_c value of 50 000 A cm^-2 at 77 K and 2 T was achieved in (Nd, Eu, Gd)Ba₂Cu₃O_y for field parallel to the c-axis.

Original language	English
Pages (from-to)	663-670
Number of pages	8
Journal	Superconductor Science and Technology
Volume	10
Issue number	9
DOIs	https://doi.org/10.1088/0953-2048/10/9/006
Publication status	Published - 1997 Sept 1
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Effect of mixing three rare-earth elements on the superconducting properties of REBa2Cu3Oy",

abstract = "We report the effect of mixing three rare-earth (RE) elements in the RE site on the superconducting properties of melt-processed REBa2Cu3Oy, in which RE elements are selected from the group of Nd, Sm, Eu and Gd. The heat treatment profiles for melt processing were determined according to the peritectic decomposition temperatures obtained from the thermal analysis measurements. Microstructural observations and compositional analysis showed that the main phase was (R10.33R20.33R30.33)Ba2Cu 3Oy, in which the ratio of three RE elements (R1, R2, R3) was equal to that of the nominal composition, indicating that mixing of RE elements was uniform. All the samples showed relatively high Tc in the range 93.1-95.3 K and exhibited the secondary peak effect in the magnetization curves at 77 K with the irreversibility field higher than that of melt-processed Y-Ba-Cu-O. A high Jc value of 50 000 A cm-2 at 77 K and 2 T was achieved in (Nd, Eu, Gd)Ba2Cu3Oy for field parallel to the c-axis.",

author = "M. Muralidhar and Chauhan, {H. S.} and T. Saitoh and K. Kamada and K. Segawa and M. Murakami",

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T1 - Effect of mixing three rare-earth elements on the superconducting properties of REBa2Cu3Oy

AU - Muralidhar, M.

AU - Chauhan, H. S.

AU - Saitoh, T.

AU - Kamada, K.

AU - Segawa, K.

AU - Murakami, M.

PY - 1997/9/1

Y1 - 1997/9/1

N2 - We report the effect of mixing three rare-earth (RE) elements in the RE site on the superconducting properties of melt-processed REBa2Cu3Oy, in which RE elements are selected from the group of Nd, Sm, Eu and Gd. The heat treatment profiles for melt processing were determined according to the peritectic decomposition temperatures obtained from the thermal analysis measurements. Microstructural observations and compositional analysis showed that the main phase was (R10.33R20.33R30.33)Ba2Cu 3Oy, in which the ratio of three RE elements (R1, R2, R3) was equal to that of the nominal composition, indicating that mixing of RE elements was uniform. All the samples showed relatively high Tc in the range 93.1-95.3 K and exhibited the secondary peak effect in the magnetization curves at 77 K with the irreversibility field higher than that of melt-processed Y-Ba-Cu-O. A high Jc value of 50 000 A cm-2 at 77 K and 2 T was achieved in (Nd, Eu, Gd)Ba2Cu3Oy for field parallel to the c-axis.

AB - We report the effect of mixing three rare-earth (RE) elements in the RE site on the superconducting properties of melt-processed REBa2Cu3Oy, in which RE elements are selected from the group of Nd, Sm, Eu and Gd. The heat treatment profiles for melt processing were determined according to the peritectic decomposition temperatures obtained from the thermal analysis measurements. Microstructural observations and compositional analysis showed that the main phase was (R10.33R20.33R30.33)Ba2Cu 3Oy, in which the ratio of three RE elements (R1, R2, R3) was equal to that of the nominal composition, indicating that mixing of RE elements was uniform. All the samples showed relatively high Tc in the range 93.1-95.3 K and exhibited the secondary peak effect in the magnetization curves at 77 K with the irreversibility field higher than that of melt-processed Y-Ba-Cu-O. A high Jc value of 50 000 A cm-2 at 77 K and 2 T was achieved in (Nd, Eu, Gd)Ba2Cu3Oy for field parallel to the c-axis.

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Effect of mixing three rare-earth elements on the superconducting properties of REBa₂Cu₃O_y

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