Synthesis of c-axis-oriented Sm123 superconductors and their performance as superconducting permanent magnets

U. Mizutani, A. Mase, K. Tazoe, H. Ikuta, Tetsuo Oka, Y. Itoh, Y. Yanagi, M. Yoshikawa

Research output: Contribution to journalConference article

18 Citations (Scopus)

Abstract

The addition of Ag2O up to 20 wt.% could reinforce its mechanical strength and led us to grow the c-axis-oriented single-domain Sm123 superconductors up to a diameter of 36 mm. The trapped field at 77 K reached 2.1 T and increased to 9 T at 25 K. The maximum trapped field is found to be limited by fracture due to the magnetic stress, which causes the crack to initiate from the region under the seed crystal near the center of the sample with its subsequent propagation through voids. The amount of voids can be substantially reduced when the oxygen partial pressure is increased at the early stage of the melt-processing. The Ba/Sm substitution effect degrades the superconducting performance and lowers the superconducting transition temperature to 80 K only near the central region. The trapped field after drilling a hole through the center of the sample was measured. Its potential use is suggested in practical application.

Original languageEnglish
Pages (from-to)92-96
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume335
Issue number1
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes
Event9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn
Duration: 1999 Oct 131999 Oct 15

Fingerprint

Superconducting magnets
superconducting magnets
permanent magnets
Partial pressure
Permanent magnets
Superconducting materials
Superconducting transition temperature
Strength of materials
voids
Drilling
Substitution reactions
Oxygen
Cracks
Crystals
synthesis
Processing
drilling
partial pressure
seeds
cracks

ASJC Scopus subject areas

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

Cite this

Synthesis of c-axis-oriented Sm123 superconductors and their performance as superconducting permanent magnets. / Mizutani, U.; Mase, A.; Tazoe, K.; Ikuta, H.; Oka, Tetsuo; Itoh, Y.; Yanagi, Y.; Yoshikawa, M.

In: Physica C: Superconductivity and its Applications, Vol. 335, No. 1, 01.01.2000, p. 92-96.

Research output: Contribution to journalConference article

Mizutani, U. ; Mase, A. ; Tazoe, K. ; Ikuta, H. ; Oka, Tetsuo ; Itoh, Y. ; Yanagi, Y. ; Yoshikawa, M. / Synthesis of c-axis-oriented Sm123 superconductors and their performance as superconducting permanent magnets. In: Physica C: Superconductivity and its Applications. 2000 ; Vol. 335, No. 1. pp. 92-96.
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