Evaluation of magnetic homogeneities of Gd-Ba-Cu-O bulk superconductors by different Hall probe scanning methods

T. Kono, H. Fukai, Naomichi Sakai, S. Nariki, I. Hirabayashi, Masato Murakami, N. Koshizuka

Research output: Contribution to journalArticle

Abstract

We investigated magnetic homogeneities of Gd-Ba-Cu-O bulk superconductors by means of a conventional scanning Hall probe (SHP) method and a recently developed magneto-scan method. In the SHP method, we measured the trapped flux density distributions of the superconductors by scanning a Hall sensor above the sample surface. On the other hand, in the magneto-scan method, we scanned a Hall probe sensor together with a permanent magnet, which allowed us to detect the field shielding behavior on the sample surface without applying a strong external field. It was found that the magneto-scan method was more sensitive than the SHP method for the detection of local structures in the flux density distributions.

Original languageEnglish
Pages (from-to)632-638
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - 2005 Oct 1

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Keywords

  • Gd-Ba-Cu-O
  • Homogeneities
  • Magneto-scan method
  • Scanning Hall probe method

ASJC Scopus subject areas

  • Condensed Matter Physics

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