Cooperative Behavior of the Random and Correlated Pinning in Er123 Films With Columnar Defects

Author

Awaji, Satoshi ; Namba, Masafumi ; Watanabe, Kazuo ; Ito, Shun ; Aoyagi, Eiji ; Kai, Hideki ; Mukaida, Masashi ; Okayasu, Satoru

Author_Institution

High Field Lab. for Supercond. Mater., Tohoku Univ., Sendai, Japan

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

3192

Lastpage

3195

Abstract

The flux pinning behaviors for the heavy ion irradiated Er123 films are investigated based on the detailed J_c(B,T,θ) properties. The double peaks of F_p curves for B//c appear in case of the matching field of 0.3 T along c-axis and 1.7 T tilted from c-axis. In addition, the peaks on J_c(θ) at θ = 0°(B//c), which originate from the columnar defects, decrease with increasing magnetic field but increase again near the irreversibility field. We found that the cooperation model of the c-axis correlated and random pinning centers can describe the observed double peak behavior of F_p(B) and the angular dependence of J_c related to the correlated pinning.

Keywords

barium compounds; critical current density (superconductivity); erbium compounds; flux pinning; high-temperature superconductors; ion beam effects; superconducting thin films; ErBa₂Cu₃O₇; angular dependence; columnar defects; correlated pinning; critical current density; flux pinning; heavy ion irradiated films; high-temperature superconducting film; random pinning centers; Critical current density; Force; High temperature superconductors; Indium tin oxide; Magnetic flux; Magnetic resonance imaging; Superconducting magnets; Columnar defect; critical current density; flux pinning; high-temperature superconducting film;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2089588

Filename

5634063