Flux pinning by inclusions in superconductors: A combined effect of point, interface, and pinning at elevated temperatures

Tadashi Mochida, Noriko Chikumoto, Masato Murakami

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

We have systematically studied the role of (Formula presented) (Nd422) nonsuperconducting inclusions for flux pinning in oxygen-controlled-melt-growth processed Nd-Ba-Cu-O bulk superconductors. Nd422 inclusions act as interface pinning which is the most dominant in low-field and high-temperature region. In addition, they are also effective in enhancing the critical current density (Formula presented) even in a high-field region and thus the irreversibility field (Formula presented) Three pinning regimes have been identified at elevated temperatures (Formula presented) K): a combination of point and interface pinning in low fields; a combination of interface and (Formula presented) pinning in intermediate fields; and interface pinning with a slight influence from (Formula presented) pinning in high fields. Nd422 addition shifted the boundary of the pinning regime to higher fields. We have found overall (Formula presented) is almost a simple summation of two contributions: interface pinning and (Formula presented) pinning.

Original languageEnglish
Pages (from-to)1350-1360
Number of pages11
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number2
DOIs
Publication statusPublished - 2000 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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