LRE-BA2cu3oy superconductors on the way to applications

Muralidhar Miryala, Kenji Suzuki, Milos Jirsa, Masaru Tomita

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)


The current status, recent development and production techniques for bulk LRE-BA2cu3oy"LRE-123" (LRE=light rare earth, Nd, Eu, Sm, Gd, NEG, SEG) superconductorsare presented. The emphasis is focused on the flux pinning of LRE-123materials, especially the size effect of the initially added nanometer-sized Gd-211, thenew class of nano-scale pinning centers contaminated by a minute amount of Zr-, Ti-,Mo- or Nb- oxides. The topic is reviewed and discussed especially from the viewpoint ofapplications of superconducting permanent magnets in a variety of industrial applicationsincluding Maglev technology. For this aim, a batch process has been developed allowingfabrication of a large quantity of single-domain LRE-123 bulks melt-textured in air or inAr/1% O2 atmosphere, using a cold seeding method with Nd-123/MgO films. Using thesebatch-processed LRE-123 bulks, a child levitation disk, a child Maglev vehicle etc. havebeen constructed that proved that the present technology is capable of producingsuperconducting materials with a reasonable cost and high performance suitable fordesign of powerful superconducting super-magnets.

Original languageEnglish
Title of host publicationSuperconductivity
Subtitle of host publicationRecent Developments and New Production Technologies
PublisherNova Science Publishers, Inc.
Number of pages19
ISBN (Print)9781622571376
Publication statusPublished - 2012 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)


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