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

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

2965

Lastpage

2969

Abstract

Easy axes of magnetization at room temperature in REBa₂Cu₃O_y (RE: rare earth) and Bi₂Sr₂Ca_1-xRE_xCu₂O_y 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; Bi₂Sr₂Ca_0.25Er_0.75Cu₂O_8+delta; Y123 powders; Y_1-xEr_xBa₂Cu₃O_y; 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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018154

Filename

5153159