Growth and superconducting properties of YBa2Cu3O7 films on silver substrates by MOCVD in magnetic fields

Yanwei Ma; Kazuo Watanabe; Satoshi Awaji; Mitsuhiro Motokawa

doi:10.1016/S0921-4534(01)00241-6

Growth and superconducting properties of YBa₂Cu₃O₇ films on silver substrates by MOCVD in magnetic fields

Yanwei Ma, Kazuo Watanabe, Satoshi Awaji, Mitsuhiro Motokawa

High Field Laboratory for Superconducting Materials

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

6 Citations (Scopus)

Abstract

YBa₂Cu₃O₇ (YBCO) films were grown on polycrystalline silver substrates by metalorganic chemical vapor deposition (MOCVD) in high magnetic fields. It is demonstrated that a magnetic field affected the microstructure of the films on polycrystalline silver substrates. Large square-shaped grains were observed in the 0 T films. The grain size was drastically reduced by application of a few tesla fields, then changed to small grains with an irregular shape above 4 T. Furthermore, it is found that application of a large magnetic field during the deposition improved the crystallinity and grain connectivity of YBCO films, leading to the improvement of the critical current density J_c.

Original language	English
Pages (from-to)	337-340
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	357-360
DOIs	https://doi.org/10.1016/S0921-4534(01)00241-6
Publication status	Published - 2001 Sep

Keywords

Chemical vapor deposition
Magnetic field
Silver particles
YBaCuO films

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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abstract = "YBa2Cu3O7 (YBCO) films were grown on polycrystalline silver substrates by metalorganic chemical vapor deposition (MOCVD) in high magnetic fields. It is demonstrated that a magnetic field affected the microstructure of the films on polycrystalline silver substrates. Large square-shaped grains were observed in the 0 T films. The grain size was drastically reduced by application of a few tesla fields, then changed to small grains with an irregular shape above 4 T. Furthermore, it is found that application of a large magnetic field during the deposition improved the crystallinity and grain connectivity of YBCO films, leading to the improvement of the critical current density Jc.",

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T1 - Growth and superconducting properties of YBa2Cu3O7 films on silver substrates by MOCVD in magnetic fields

AU - Ma, Yanwei

AU - Watanabe, Kazuo

AU - Awaji, Satoshi

AU - Motokawa, Mitsuhiro

PY - 2001/9

Y1 - 2001/9

N2 - YBa2Cu3O7 (YBCO) films were grown on polycrystalline silver substrates by metalorganic chemical vapor deposition (MOCVD) in high magnetic fields. It is demonstrated that a magnetic field affected the microstructure of the films on polycrystalline silver substrates. Large square-shaped grains were observed in the 0 T films. The grain size was drastically reduced by application of a few tesla fields, then changed to small grains with an irregular shape above 4 T. Furthermore, it is found that application of a large magnetic field during the deposition improved the crystallinity and grain connectivity of YBCO films, leading to the improvement of the critical current density Jc.

AB - YBa2Cu3O7 (YBCO) films were grown on polycrystalline silver substrates by metalorganic chemical vapor deposition (MOCVD) in high magnetic fields. It is demonstrated that a magnetic field affected the microstructure of the films on polycrystalline silver substrates. Large square-shaped grains were observed in the 0 T films. The grain size was drastically reduced by application of a few tesla fields, then changed to small grains with an irregular shape above 4 T. Furthermore, it is found that application of a large magnetic field during the deposition improved the crystallinity and grain connectivity of YBCO films, leading to the improvement of the critical current density Jc.

KW - Chemical vapor deposition

KW - Magnetic field

KW - Silver particles

KW - YBaCuO films

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