Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application

S. Nariki, N. Sakai, I. Hirabayashi, M. Yoshikawa, Y. Itoh, T. Nakamura, H. Utumi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have investigated the fabrication and the superconducting and field trapping properties of large melt-textured Eu-Ba-Cu-O bulk superconductors for the purpose of application as a compact NMR magnet. We successfully fabricated c-axis oriented single-grain bulk samples up to 65 mm in diameter by melt-processing under a low oxygen partial pressure. The samples of 33 and 47 mm diameters could trap magnetic fields of 1.4 and 1.7 T at 77 K, respectively. The position dependence of Tc in the sample of 33mm diameter is very small throughout the sample. In 65 mm-sized sample, however, Tc and Jc lowered in inner region of the sample, leading to lowering of maximum trapped field. Trapped magnetic field was improved with keeping for long time at maximum temperature in melt-processing.

Original languageEnglish
Pages (from-to)1451-1455
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume468
Issue number15-20
DOIs
Publication statusPublished - 2008 Sep 15
Externally publishedYes

Keywords

  • Eu-Ba-Cu-O
  • Melt-textured bulk
  • NMR
  • Superconducting magnet
  • Trapped magnetic field

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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