3-dimensional grain orientation of Re-Ba-Cu-O superconductors using a modulated oval magnetic field

Takayuki Fukushima, Shigeru Horii, Tetsuo Uchikoshi, Hiraku Ogino, Atsushi Ishihara, Tohru S. Suzuki, Yoshio Sakka, Jun Ichi Shimoyama, Kohji Kishio

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Tri-axial orientation of twin-free powders of RE2Ba 4Cu7O15-σ (RE247, RE = Y, Dy, Ho, Er) was attempted by modulated rotating magnetic fields. The c-axis orientation was almost completely achieved for all the four RE247 compounds, whereas the degrees of in-plane orientation depended on RE element. Especially for Y247, the degrees of in-plane and c-axis orientation were determined to be ∼ 2.5° and < 2°, respectively, by the φ-scanning and rocking curve measurements. This excellent in-plane orientation is comparable or superior to those for coated conductors (∼ 4°) and melt-solidified bulks (∼ 8°) of REBa2Cu3O7-σ. Magnetic field dependence of Lotgering factors revealed that the degrees of in-plane orientation were sensitive to the applied magnetic field. The required magnetic field for the tri-axial orientation is determined by the in-plane magnetic anisotropy rather than the magnetic anisotropy between in-plane and out-of-plane directions.

Original languageEnglish
Article number5153200
Pages (from-to)2961-2964
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - 2009 Jun 1
Externally publishedYes

Keywords

  • Modulated rotation magnetic field
  • REBaCu O tri-axial orientation

ASJC Scopus subject areas

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

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