Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors

T. Yamada; H. Ikuta; M. Yoshikawa; Y. Yanagi; Y. Itoh; T. Oka; U. Mizutani

doi:10.1016/S0921-4534(02)01527-7

Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors

T. Yamada, H. Ikuta, M. Yoshikawa, Y. Yanagi, Y. Itoh, T. Oka, U. Mizutani

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

7 Citations (Scopus)

Abstract

We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.

Original language	English
Pages (from-to)	713-717
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01527-7
Publication status	Published - 2002 Oct 1
Externally published	Yes

Keywords

Effect of Ag addition
Melt-processed superconductor
Oxygen diffusivity
Sm-Ba-Cu-O
Y-Ba-Cu-O

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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10.1016/S0921-4534(02)01527-7

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title = "Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors",

abstract = "We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.",

keywords = "Effect of Ag addition, Melt-processed superconductor, Oxygen diffusivity, Sm-Ba-Cu-O, Y-Ba-Cu-O",

author = "T. Yamada and H. Ikuta and M. Yoshikawa and Y. Yanagi and Y. Itoh and T. Oka and U. Mizutani",

note = "Funding Information: This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by the Iwatani Naoji Foundation's Research Grant.",

year = "2002",

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doi = "10.1016/S0921-4534(02)01527-7",

language = "English",

volume = "378-381",

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TY - JOUR

T1 - Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors

AU - Yamada, T.

AU - Ikuta, H.

AU - Yoshikawa, M.

AU - Yanagi, Y.

AU - Itoh, Y.

AU - Oka, T.

AU - Mizutani, U.

N1 - Funding Information: This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by the Iwatani Naoji Foundation's Research Grant.

PY - 2002/10/1

Y1 - 2002/10/1

N2 - We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.

AB - We studied the diffusivity of oxygen in melt-processed Sm-Ba-Cu-O (SmBCO) and Y-Ba-Cu-O (YBCO) bulk-superconductors. The chemical diffusion coefficients of oxygen estimated from the experimental results show that the addition of silver suppresses the oxygen diffusivity in melt-processed bulk-superconductors. On the other hand, the diffusion coefficients of SmBCO/Ag and YBCO/Ag were almost identical. We discuss the effect of Ag addition on the oxygen diffusivity by examining the microstructure of the samples. It is also shown that annealing at a lower temperature than YBCO is necessary to extract the high potential of SmBCO.

KW - Effect of Ag addition

KW - Melt-processed superconductor

KW - Oxygen diffusivity

KW - Sm-Ba-Cu-O

KW - Y-Ba-Cu-O

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U2 - 10.1016/S0921-4534(02)01527-7

DO - 10.1016/S0921-4534(02)01527-7

M3 - Article

AN - SCOPUS:0036789123

SN - 0921-4534

VL - 378-381

SP - 713

EP - 717

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - PART 1

ER -

Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors

Abstract

Keywords

ASJC Scopus subject areas

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