Study of columnar defect formation in MOD YBCO film using chemical doping

Jin Chen; Yuxiang Zhou; S. Ghalsasi; I. Rusakova; Kamel Salama

doi:10.1109/TASC.2009.2018421

Study of columnar defect formation in MOD YBCO film using chemical doping

Jin Chen, Yuxiang Zhou, S. Ghalsasi, I. Rusakova, Kamel Salama

Diagnostic Radiology

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

3 Scopus citations

Abstract

This paper describes a promising route to introduce columnar defects into YBCO films by chemical doping process. A series of Y₂0₃ and BaZrO₃ doped YBCO films were fabricated by a TFA-MOD process. The J_c of Y₂0₃ doped YBCO film was found to be larger than that of pure YBCO film at all fields though no columnar defects were observed. On the other hand, high density nanoscale Zr enriched columnar defects were successfully achieved in Zr-doped YBCO. The size of these defects was as small as 10 nm. Effects of heat treatment temperatures (760°C ∼ 820°C), dwell times (0.5 h∼3 h) and partial pressures of oxygen (0∼1%) on defects formation in BaZrO₃ doped YBCO were investigated. It was found that the formation of columnar defects depends on process conditions. Films with such nanoscale columnar defects exhibited a significant enhancement of J_c at all fields. Maximum pinning force density exceeding 8 GN m^-3 was obtained in 5% BZO-doped YBCO films.

Original language	English (US)
Article number	5152945
Pages (from-to)	3254-3257
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	19
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2009.2018421
State	Published - Jun 2009

Keywords

BaZrO doping
Coated conductor
TFA-MOD
YBCO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2009.2018421

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title = "Study of columnar defect formation in MOD YBCO film using chemical doping",

abstract = "This paper describes a promising route to introduce columnar defects into YBCO films by chemical doping process. A series of Y203 and BaZrO3 doped YBCO films were fabricated by a TFA-MOD process. The Jc of Y203 doped YBCO film was found to be larger than that of pure YBCO film at all fields though no columnar defects were observed. On the other hand, high density nanoscale Zr enriched columnar defects were successfully achieved in Zr-doped YBCO. The size of these defects was as small as 10 nm. Effects of heat treatment temperatures (760°C ∼ 820°C), dwell times (0.5 h∼3 h) and partial pressures of oxygen (0∼1%) on defects formation in BaZrO3 doped YBCO were investigated. It was found that the formation of columnar defects depends on process conditions. Films with such nanoscale columnar defects exhibited a significant enhancement of Jc at all fields. Maximum pinning force density exceeding 8 GN m-3 was obtained in 5% BZO-doped YBCO films.",

keywords = "BaZrO doping, Coated conductor, TFA-MOD, YBCO",

author = "Jin Chen and Yuxiang Zhou and S. Ghalsasi and I. Rusakova and Kamel Salama",

note = "Funding Information: Manuscript received August 26, 2008. First published June 30, 2009; current version published July 15, 2009. This work was supported in part by TcSUH and Department of Energy. Funding Information: The authors thank Y. Y. Sun for x-ray and Z. J. Tang for magnetic property characterizations of some of the samples. This work was financially supported by the Texas Center for Superconductivity at University of Houston.",

year = "2009",

month = jun,

doi = "10.1109/TASC.2009.2018421",

language = "English (US)",

volume = "19",

pages = "3254--3257",

journal = "IEEE Transactions on Applied Superconductivity",

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AU - Chen, Jin

AU - Zhou, Yuxiang

AU - Ghalsasi, S.

AU - Rusakova, I.

AU - Salama, Kamel

N1 - Funding Information: Manuscript received August 26, 2008. First published June 30, 2009; current version published July 15, 2009. This work was supported in part by TcSUH and Department of Energy. Funding Information: The authors thank Y. Y. Sun for x-ray and Z. J. Tang for magnetic property characterizations of some of the samples. This work was financially supported by the Texas Center for Superconductivity at University of Houston.

PY - 2009/6

Y1 - 2009/6

N2 - This paper describes a promising route to introduce columnar defects into YBCO films by chemical doping process. A series of Y203 and BaZrO3 doped YBCO films were fabricated by a TFA-MOD process. The Jc of Y203 doped YBCO film was found to be larger than that of pure YBCO film at all fields though no columnar defects were observed. On the other hand, high density nanoscale Zr enriched columnar defects were successfully achieved in Zr-doped YBCO. The size of these defects was as small as 10 nm. Effects of heat treatment temperatures (760°C ∼ 820°C), dwell times (0.5 h∼3 h) and partial pressures of oxygen (0∼1%) on defects formation in BaZrO3 doped YBCO were investigated. It was found that the formation of columnar defects depends on process conditions. Films with such nanoscale columnar defects exhibited a significant enhancement of Jc at all fields. Maximum pinning force density exceeding 8 GN m-3 was obtained in 5% BZO-doped YBCO films.

AB - This paper describes a promising route to introduce columnar defects into YBCO films by chemical doping process. A series of Y203 and BaZrO3 doped YBCO films were fabricated by a TFA-MOD process. The Jc of Y203 doped YBCO film was found to be larger than that of pure YBCO film at all fields though no columnar defects were observed. On the other hand, high density nanoscale Zr enriched columnar defects were successfully achieved in Zr-doped YBCO. The size of these defects was as small as 10 nm. Effects of heat treatment temperatures (760°C ∼ 820°C), dwell times (0.5 h∼3 h) and partial pressures of oxygen (0∼1%) on defects formation in BaZrO3 doped YBCO were investigated. It was found that the formation of columnar defects depends on process conditions. Films with such nanoscale columnar defects exhibited a significant enhancement of Jc at all fields. Maximum pinning force density exceeding 8 GN m-3 was obtained in 5% BZO-doped YBCO films.

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Study of columnar defect formation in MOD YBCO film using chemical doping

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