Single domain YBCO/Ag bulk superconductors fabricated by seeded infiltration and growth

Kazumasa Iida, Nadendla Hari Babu, Yunhua Shi, Taro Miyazaki, Naomichi Sakai, Masato Murakami, David A. Cardwell

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We have applied the seeded infiltration and growth (IG) technique to the processing of samples containing Ag in an attempt to fabricate Ag-doped Y-Ba-Cu-O (YBCO) bulk superconductors with enhanced mechanical properties. The IG technique has been used successfully to grow bulk Ag-doped YBCO superconductors of up to 25 mm in diameter in the form of single grains. The distribution of Ag in the parent Y-123 matrix fabricated by the IG technique is observed to be at least as uniform as that in samples grown by conventional top seeded melt growth (TSMG). Fine Y-211 particles were observed to be embedded within the Y-123 matrix for the IG processed samples, leading to a high critical current density, Jc, of over 70 kA/cm2 at 77.3 K in self-field. The distribution of Y-211 in the IG sample microstructure, however, is inhomogeneous, which leads to a variation in the spatial distribution of Jc throughout the bulk matrix. A maximum-trapped field of around 0.43 T at 1.2 mm above the sample surface (i.e. including 0.7 mm for the sensor mould thickness) is observed at liquid nitrogen temperature, despite the relatively small grain size of the sample (20 mm diameter × 7 mm thickness).

Original languageEnglish
Article number012105
JournalJournal of Physics: Conference Series
Volume97
Issue number1
DOIs
Publication statusPublished - 2008 Feb 1

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infiltration
matrices
YBCO superconductors
liquid nitrogen
critical current
spatial distribution
grain size
mechanical properties
current density
microstructure
sensors

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Single domain YBCO/Ag bulk superconductors fabricated by seeded infiltration and growth. / Iida, Kazumasa; Babu, Nadendla Hari; Shi, Yunhua; Miyazaki, Taro; Sakai, Naomichi; Murakami, Masato; Cardwell, David A.

In: Journal of Physics: Conference Series, Vol. 97, No. 1, 012105, 01.02.2008.

Research output: Contribution to journalArticle

Iida, Kazumasa ; Babu, Nadendla Hari ; Shi, Yunhua ; Miyazaki, Taro ; Sakai, Naomichi ; Murakami, Masato ; Cardwell, David A. / Single domain YBCO/Ag bulk superconductors fabricated by seeded infiltration and growth. In: Journal of Physics: Conference Series. 2008 ; Vol. 97, No. 1.
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