Controlled levitation of bulk superconductors

Ken Nagashima, Yukikazu Iwasa, Koichiro Sawa, Masato Murakami

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

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
Volume10
Issue number3
DOIs
Publication statusPublished - 2000 Sep
Externally publishedYes

Fingerprint

levitation
Superconducting materials
Electromagnets
Induced currents
Energy balance
YBCO superconductors
electromagnets
energy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Controlled levitation of bulk superconductors. / Nagashima, Ken; Iwasa, Yukikazu; Sawa, Koichiro; Murakami, Masato.

In: IEEE Transactions on Applied Superconductivity, Vol. 10, No. 3, 09.2000, p. 1642-1648.

Research output: Contribution to journalArticle

Nagashima, Ken ; Iwasa, Yukikazu ; Sawa, Koichiro ; Murakami, Masato. / Controlled levitation of bulk superconductors. In: IEEE Transactions on Applied Superconductivity. 2000 ; Vol. 10, No. 3. pp. 1642-1648.
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