Bi addition effect on Jc-B performance of powder-in-tube processed MgB2 tapes

Xianping Zhang, Ma Yanwei, Zhaoshun Gao, Dongliang Wang, Zhengguang Yu, Satoshi Awaji, Kazuo Watanabe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

MgB2 tapes with 5 at.% Bi addition were fabricated through the in situ powder-in-tube method. Heat treatment was carried out at 700°C and 800°C for 1 h. The phase, microstructure, superconductivity and flux pinning ability were characterized by XRD, SEM, magnetic and transport measurements. The critical current density Jc and Jc-B performance for the doped and undoped samples are also given. It is found that nano-Bi doping decreased the magnetic field sensitivity of Jc, indicating an improvement of flux pinning. At 4.2 K, 10 T, Jc values of the Bi doped tapes enhanced about 2.5 times compared to that of undoped samples. The mechanism for improved Jc-B performance of Bi-doped MgB2 tapes is investigated.

Original languageEnglish
Pages (from-to)2925-2928
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume17
Issue number2
DOIs
Publication statusPublished - 2007 Jun

Keywords

  • Critical current property
  • Doping effect
  • MgB
  • Microstructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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