Flux pinning at grain boundaries in liquid phase sintered YBCO

Author

Yamada, Yasuji ; Kuwahara, Taiki ; Donishi, Takafumi ; Kubo, Shugo

Author_Institution

Shimane Univ., Japan

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

3122

Lastpage

3124

Abstract

Flux pinning behavior in liquid phase sintered YBa₂Cu₃O_7-δ (YBCO) has been investigated in terms of preparation processing and pinning behavior. Liquid phase sintering method, which composed of two processes, mixing of YBCO precursor and liquid phase component and sintering at temperatures above the melting point of the liquid phase component, showed obvious Jc increase at high magnetic fields. Structure of the samples showing the increase of Jc by the liquid phase sintering is quite different from that showing no Jc increase. Structural dependence suggests that this pinning effect possibly originates from grain boundaries and oxygen deficiencies in the samples.

Keywords

barium compounds; critical current density (superconductivity); flux pinning; grain boundaries; high-temperature superconductors; sintering; yttrium compounds; YBa₂Cu₃O_7-δ; flux pinning; grain boundaries; high-temperature superconductors; liquid phase sintering; materials preparation processing; melting point; superconducting composites; superconducting magnets; superconducting materials; Critical current density; Flux pinning; Grain boundaries; High temperature superconductors; Magnetic flux; Magnetic liquids; Solvents; Superconducting magnets; Superconductivity; Yttrium barium copper oxide; High-temperature superconductors; superconducting composites; superconducting magnets; superconducting materials;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.848976

Filename

1440331