Controlled levitation of bulk superconductors

Ken Nagashima, Yukikazu Iwasa, Koichiro Sawa, Masato Murakami

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Levitation of bulk Y-Ba-Cu-O superconductors could successfully be controlled using a Bi-Sr-Ca-Cu-O superconducting electromagnet. It was found that stable levitation without tilting was obtained only when the sample trapped a certain amount of field, the minimum of which depended on the external field and the sample dimensions. We also employed the novel analysis method for levitation based on the total energy balance, which is much simpler than the force method and could be applied to the understanding of general levitation behavior. Numerical analyzes thus developed suggested that stable levitation of superconductors with large dimensions can only be achieved when the induced currents can flow with three dimensional freedom.

Original languageEnglish
Pages (from-to)1642-1648
Number of pages7
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2000 Sept
Externally publishedYes

ASJC Scopus subject areas

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


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