Title :
Elucidation of Crystal-Chemical Determination Factor of Magnetic Anisotropy in HTSC
Author :
Ishihara, Atsushi ; Horii, Shigeru ; Uchikoshi, Tetsuo ; Suzuki, Tohru S. ; Sakka, Yoshio ; Ogino, Hiraku ; Shimoyama, Jun-ichi ; Kishio, Kohji
Author_Institution :
Dept. of Appl. Chem., Univ. of Tokyo, Tokyo, Japan
fDate :
6/1/2009 12:00:00 AM
Abstract :
Easy axes of magnetization at room temperature in REBa2Cu3Oy (RE: rare earth) and Bi2Sr2Ca1-xRExCu2Oy were clarified using their powders oriented in a static magnetic field. The easy axes clearly depended on the type of RE which could be mainly explained in terms of second-order Stevens factors and magnetic anisotropy of the CuO2 plane. Furthermore, we found the difference in magnetic effects of Er3+ for orientation through systematic evaluations of Er-doped Y123 and Bi2212 powders. This result means that magnetic anisotropies of RE3+ ions are sensitive to not only the type of RE but also local structure of oxygen ions surrounding RE3+ ions.
Keywords :
barium compounds; bismuth compounds; calcium compounds; erbium compounds; high-temperature superconductors; magnetic anisotropy; magnetic particles; powders; strontium compounds; yttrium compounds; Bi2212 powders; Bi2Sr2Ca0.25Er0.75Cu2O8+delta; Y123 powders; Y1-xErxBa2Cu3Oy; crystal-chemical determination factor; high-temperature superconductors; magnetic anisotropy; magnetization; powders; second-order Stevens factors; static magnetic field; temperature 293 K to 298 K; High-temperature superconductors; magnetic anisotropy; magnetic susceptibility; position control;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2018154
