Preparation of YBCO films by chemical vapor deposition in a magnetic field

Satoshi Awaji; Kazuo Watanabe; Yanwei Ma; Mitsuhiro Motokawa

doi:10.1016/S0921-4526(00)00705-5

Preparation of YBCO films by chemical vapor deposition in a magnetic field

Satoshi Awaji, Kazuo Watanabe, Yanwei Ma, Mitsuhiro Motokawa

High Field Laboratory for Superconducting Materials

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

17 Citations (Scopus)

Abstract

YBCO films on single-crystalline MgO substrates and polycrystalline Ag substrates were prepared by chemical vapor deposition in magnetic fields up to 10 T, using a cryo-cooled superconducting magnet. In the case of the MgO substrates, microstructure was independent of the magnetic field but J_c was significantly improved. In contrast, with polycrystalline Ag substrates, the microstructure changed drastically; again J_c was improved. Large square-shaped grains with a size of 5-14 μm were observed for samples grown on Ag substrates at 0 T. These grains were reduced in size when a field of several tesla was applied during the CVD process and their shape became irregular above 4 T. These changes of the microstructure improve the critical current density. The values of J_c for the films deposited on the polycrystalline Ag substrates in 8 T were 5.76×10⁴ A/cm² at 0 T and 77.3 K.

Original language	English
Pages (from-to)	482-485
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	294-295
DOIs	https://doi.org/10.1016/S0921-4526(00)00705-5
Publication status	Published - 2001 Jan

Keywords

Chemical vapor deposition
Critical current density
High magnetic fields
MgO
Polycrystalline Ag
YBaCuOfilm

ASJC Scopus subject areas

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

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10.1016/S0921-4526(00)00705-5

Cite this

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title = "Preparation of YBCO films by chemical vapor deposition in a magnetic field",

abstract = "YBCO films on single-crystalline MgO substrates and polycrystalline Ag substrates were prepared by chemical vapor deposition in magnetic fields up to 10 T, using a cryo-cooled superconducting magnet. In the case of the MgO substrates, microstructure was independent of the magnetic field but Jc was significantly improved. In contrast, with polycrystalline Ag substrates, the microstructure changed drastically; again Jc was improved. Large square-shaped grains with a size of 5-14 μm were observed for samples grown on Ag substrates at 0 T. These grains were reduced in size when a field of several tesla was applied during the CVD process and their shape became irregular above 4 T. These changes of the microstructure improve the critical current density. The values of Jc for the films deposited on the polycrystalline Ag substrates in 8 T were 5.76×104 A/cm2 at 0 T and 77.3 K.",

keywords = "Chemical vapor deposition, Critical current density, High magnetic fields, MgO, Polycrystalline Ag, YBaCuOfilm",

author = "Satoshi Awaji and Kazuo Watanabe and Yanwei Ma and Mitsuhiro Motokawa",

year = "2001",

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doi = "10.1016/S0921-4526(00)00705-5",

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T1 - Preparation of YBCO films by chemical vapor deposition in a magnetic field

AU - Awaji, Satoshi

AU - Watanabe, Kazuo

AU - Ma, Yanwei

AU - Motokawa, Mitsuhiro

PY - 2001/1

Y1 - 2001/1

N2 - YBCO films on single-crystalline MgO substrates and polycrystalline Ag substrates were prepared by chemical vapor deposition in magnetic fields up to 10 T, using a cryo-cooled superconducting magnet. In the case of the MgO substrates, microstructure was independent of the magnetic field but Jc was significantly improved. In contrast, with polycrystalline Ag substrates, the microstructure changed drastically; again Jc was improved. Large square-shaped grains with a size of 5-14 μm were observed for samples grown on Ag substrates at 0 T. These grains were reduced in size when a field of several tesla was applied during the CVD process and their shape became irregular above 4 T. These changes of the microstructure improve the critical current density. The values of Jc for the films deposited on the polycrystalline Ag substrates in 8 T were 5.76×104 A/cm2 at 0 T and 77.3 K.

AB - YBCO films on single-crystalline MgO substrates and polycrystalline Ag substrates were prepared by chemical vapor deposition in magnetic fields up to 10 T, using a cryo-cooled superconducting magnet. In the case of the MgO substrates, microstructure was independent of the magnetic field but Jc was significantly improved. In contrast, with polycrystalline Ag substrates, the microstructure changed drastically; again Jc was improved. Large square-shaped grains with a size of 5-14 μm were observed for samples grown on Ag substrates at 0 T. These grains were reduced in size when a field of several tesla was applied during the CVD process and their shape became irregular above 4 T. These changes of the microstructure improve the critical current density. The values of Jc for the films deposited on the polycrystalline Ag substrates in 8 T were 5.76×104 A/cm2 at 0 T and 77.3 K.

KW - Chemical vapor deposition

KW - Critical current density

KW - High magnetic fields

KW - MgO

KW - Polycrystalline Ag

KW - YBaCuOfilm

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DO - 10.1016/S0921-4526(00)00705-5

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

ER -

Preparation of YBCO films by chemical vapor deposition in a magnetic field

Abstract

Keywords

ASJC Scopus subject areas

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