Introduction of Flux Pinning Center in Sintered Bi-2223 Superconductors by 290MeV/n 40Ar Irradiation

Takeyuki Kikuchi; Makoto Nakanishi; Masahiro Nagae; Yoshihiro Kusano; Tatsuo Fujii; Jun Takada; Nakahiro Yasuda; Takeshi Murakami

doi:10.2497/jjspm.46.994

Introduction of Flux Pinning Center in Sintered Bi-2223 Superconductors by 290MeV/n ⁴⁰Ar Irradiation

Takeyuki Kikuchi, Makoto Nakanishi, Masahiro Nagae, Yoshihiro Kusano, Tatsuo Fujii, Jun Takada, Nakahiro Yasuda, Takeshi Murakami

Author information

Keywords: Bi-2223 superconductor, Heavy ion, Flux pinning center

JOURNAL OPEN ACCESS

1999 Volume 46 Issue 9 Pages 994-998

DOI https://doi.org/10.2497/jjspm.46.994

Details

Abstract

Bi-2223 bulk superconductors were irradiated with 290MeV/n ⁴⁰Ar¹⁸⁺ ions. ⁴⁰Ar¹⁸⁺ irradiation effects on flux pinning of Bi-2223, which were estimated as ΔM from magnetic hysterisis loops measured by SQUID and VSM, were discussed. Irradiated samples had enlarged magnetic hysterisis loops than unirradiated samples. Moreover, the increment of AM depended on depth from the irradiation surface. Microstructure of irradiated samples were observed by high-resolution transmission electron microscopy (HR-TEM). However, irradiation defects such as the columnar defects were not observed in these samples.

Corresponding author

Register with J-STAGE for free!