Pulsed Field Magnetization for GdBaCuO Bulk With Stronger Pinning Characteristics

Author

Fujishiro, Hiroyuki ; Hiyama, Takuya ; Miura, Takashi ; Naito, Tomoyuki ; Nariki, Shinya ; Sakai, Naomichi ; Hirabayashi, Izumi

Author_Institution

Fac. of Eng., Iwate Univ., Morioka, Japan

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3545

Lastpage

3548

Abstract

The GdBaCuO superconducting bulk with stronger pinning characteristics (B _T = 1.8 T at 77 K by the field cooled magnetization (FCM)) has been magnetized at T _s = 70 - 20 K by the pulsed field magnetization (PFM) techniques; a sequential pulsed-field application (SPA) and a modified multi pulse technique with stepwise cooling (MMPSC). With decreasing T _s, the pinning force F _p increases especially at the growth sector boundaries (GSBs), and then the nonuniformity of the trapped field profile becomes more and more conspicuous on the bulk surface. At low T _s, the SPA technique is not necessarily a suitable technique to enhance the trapped field B _T and the total trapped flux Phi _T. However, these values can be enhanced by the MMPSC method. The properties of the bulk with stronger pinning characteristics during PFM are discussed.

Keywords

barium compounds; flux pinning; gadolinium compounds; high-temperature superconductors; magnetic flux; magnetisation; GdBaCuO; field cooled magnetization; growth sector boundaries; modified multipulse technique; pulsed field magnetization; sequential pulsed-field application; stronger pinning characteristics; superconductor; temperature 77 K; trapped field; MMPSC method; pinning force; pulsed field magnetization; trapped field;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018081

Filename

5067107