Melt processing and flux pinning of bulk RE-Ba-Cu-O high temperature superconductors

Po Wei Chen, Shih Yun Chen, In-Gann Chen, Maw Kuen Wu

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Recent advances in the processing of bulk RE-Ba-Cu-O (RE: rare-earth elements,REBCO) high-temperature superconductors are described. Different techniques, such asthin film seed crystals, top seeded melt growth (TSMG) and infiltration growth (IG)methods, and the modification of micro/nano structures have been developed to growlarge single-grained bulk superconductors with strong pinning centers at high fields.Reports show that these processing techniques led to the production of single-grainedREBCO superconductors > 10cm with trapped magnetic fields as high as 4T and 17T at77K and 29K, respectively, in a gap between two pieces of Y-Ba-Cu-O single-grainedmaterial. The significant enhancement of Jc (H,T) is found in REBCO bulks with theaddition of nano-scaled precursors. Microstructure analysis revealed that the crystallinedefects, which are related to dl pinning at low magnetic fields and the nano-scale periodicstructures, which are related to the field induced dTc pinning centers at high magneticfields are observed in the REBCO bulks with the addition of nano-scaled precursors. Inaddition, the dR/dT of Resistivity - Temperature -Magnetic field (H) curves exhibitedtwo peaks, showing that there are two types of effective pinning mechanisms at differentmagnetic fields, respectively.

Original languageEnglish
Title of host publicationSuperconductivity
Subtitle of host publicationRecent Developments and New Production Technologies
PublisherNova Science Publishers, Inc.
Pages105-125
Number of pages21
ISBN (Print)9781622571376
Publication statusPublished - 2012 Nov 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Chen, P. W., Chen, S. Y., Chen, I-G., & Wu, M. K. (2012). Melt processing and flux pinning of bulk RE-Ba-Cu-O high temperature superconductors. In Superconductivity: Recent Developments and New Production Technologies (pp. 105-125). Nova Science Publishers, Inc..