Weak links in YBCO nanopowder

Author

Paturi, Petriina ; Raittila, Jussi ; Huhtinen, Hannu

Author_Institution

Phys. Dept., Univ. of Turku, Finland

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

3133

Lastpage

3135

Abstract

We have prepared YBCO nanopowder by the sol-gel route. The original powder contains weak links as observed by magnetization and microwave absorption measurements. Most of the weak links could be reduced by keeping the powder in ethanol for 30 min in an ultrasonic bath. It was also found that the ultrasonic bath does not affect the superconducting properties of the nanoparticles themselves. The modulation field applied in the microwave absorption measurements was found to have a large effect on the temperature dependence of the absorption. This phenomenon was explained with a phase diagram for the weak links.

Keywords

barium compounds; electromagnetic wave absorption; high-temperature superconductors; magnetisation; nanoparticles; sol-gel processing; superconductive tunnelling; yttrium compounds; 30 min; YBCO nanopowder; YBa₂Cu₃O₇; high temperature superconductor; magnetization; microwave absorption; modulation field; sol-gel route; ultrasonic bath; weak links; Electromagnetic wave absorption; Ethanol; Magnetic field measurement; Magnetization; Microwave measurements; Nanoparticles; Powders; Superconducting microwave devices; Ultrasonic variables measurement; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812122

Filename

1212287