TY - JOUR
T1 - 3-dimensional grain orientation of Re-Ba-Cu-O superconductors using a modulated oval magnetic field
AU - Fukushima, Takayuki
AU - Horii, Shigeru
AU - Uchikoshi, Tetsuo
AU - Ogino, Hiraku
AU - Ishihara, Atsushi
AU - Suzuki, Tohru S.
AU - Sakka, Yoshio
AU - Shimoyama, Jun Ichi
AU - Kishio, Kohji
N1 - Funding Information:
Manuscript received August 26, 2008. First published June 30, 2009; current version published July 15, 2009. This work was supported in part by a Grant-in-Aid for Scientific Research 20900114, 19360293, and 18760051 from MEXT, Japan and the Murata Science Foundation.
PY - 2009/6
Y1 - 2009/6
N2 - 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.
AB - 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.
KW - Modulated rotation magnetic field
KW - REBaCu O tri-axial orientation
UR - http://www.scopus.com/inward/record.url?scp=68649092251&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=68649092251&partnerID=8YFLogxK
U2 - 10.1109/TASC.2009.2018859
DO - 10.1109/TASC.2009.2018859
M3 - Article
AN - SCOPUS:68649092251
SN - 1051-8223
VL - 19
SP - 2961
EP - 2964
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 5153200
ER -