[22a-1BJ-1~10] 10.5 Application of magnetic field

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[22a-1BJ-9] Study on crystal structures in DyBa₂Cu₃O_y (y = 6~7) and Dy₂Ba₄Cu₇O_y (y = 14~15) powders by in situ X ray diffraction measurements under modulated rotating magnetic fields

〇Fumiko Kimura¹, Shintaro Adachi¹, Walid Bin Ali¹, Shigeru Horii¹ (1.Kyoto Univ. Adv. Sci.)

Keywords:

superconductor,magnetic orientation,in situ X-ray diffraction measurement

We have already measured the magnetic susceptibility anisotropy ratios of Dy123 (DyBa₂Cu₃O_y (y = 6~7) ) subjected to different cooling treatments and oxygen-annealed Dy123, and the ratios decreased in the following order: (1) annealing temperature 650℃ in 0.1% oxygen atmosphere, (2) annealing temperature 550℃ in 0.1% oxygen atmosphere, and (3) annealing temperature 300℃ in 100% oxygen atmosphere. We discussed the formation of a twin structure based on the ratios.
In this study, we measured the magnetic susceptibility anisotropy ratio of Dy247( Dy₂Ba₄Cu₇O_y (y = 14~15) ), compare the anisotropy ratio of Dy247 without a twin structure and those of Dy123 with a twin structure, and discuss the twin structure of Dy123.