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

Satoshi Awaji, Kazuo Watanabe, Yanwei Ma, Mitsuhiro Motokawa

Research output: Contribution to journalArticle

16 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 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.

Original languageEnglish
Pages (from-to)482-485
Number of pages4
JournalPhysica B: Condensed Matter
Volume294-295
DOIs
Publication statusPublished - 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

Fingerprint Dive into the research topics of 'Preparation of YBCO films by chemical vapor deposition in a magnetic field'. Together they form a unique fingerprint.

  • Cite this