Twin spacing and its correlation with critical current density in melt-textured YBCO with yttria nanoparticle addition

Author

Jongprateep, Oratai ; Chan, Siu-Wai

Author_Institution

Columbia Univ., New York, NY, USA

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

3502

Lastpage

3505

Abstract

Twin boundaries have been proved to be effective flux pinning centers in YBa₂Cu₃O_7-x (YBCO). Increases in twin density yield higher values of critical current density. Twin spacings in melt-textured grown (MTG) YBCO with different amounts of yttria nanoparticles were investigated with a new x-ray method. Twin spacings from the x-ray method were compared with those from transmission electron microscopy to show applicability. From investigation, MTG-YBCO with 11.9 weight percent yttria and oxygenation temperature at 680°C showed a colony size of 3.65 microns. This particular sample had a small twin spacing of 33 nm with a corresponding high value of critical current density (J_c) of 1.2 × 10⁴ A/cm².

Keywords

X-ray diffraction; barium compounds; critical current density (superconductivity); flux pinning; high-temperature superconductors; nanoparticles; transmission electron microscopy; twin boundaries; yttrium compounds; 680 degC; X-ray diffraction; Y₂O₃; YBCO high-T_c superconductor; YBa₂Cu₃O₇; critical current density; flux pinning; melt textured growth; transmission electron microscopy; twin boundary; twin colony size; twin spacing; yttria nanoparticle addition; Critical current density; Current density; Flux pinning; Helium; Nanoparticles; Powders; Power engineering and energy; Temperature; Transmission electron microscopy; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812380

Filename

1212383