[16a-K102-1~8] 10.5 Application of magnetic field

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[16a-K102-5] Formation of Twin Crystals in (Y_1-xDy_x)123

〇Fumiko Kimura¹, Futo Fukuyama¹, K. G. P. P. Kahagalla¹, Shintaro Adachi¹, Shigeru Horii¹ (1.Kyoto Univ. Adv. Sci.)

Keywords:

Superconductor,Twin crystal,magnetic orientation

Since the discovery of YBa₂Cu₃O₇ (Y123) with a high critical temperature (Tc) of 93K in 1987, extensive research has been conducted to improve its superconducting properties. Y123 is a very promising material because its superconducting properties can be exhibited under liquid nitrogen, an inexpensive coolant. However, biaxial orientation control of Y123 is necessary for practical applications. Therefore, we use a magnetic field orientation method based on the magnetic anisotropy of the crystal axis. By doping Y123 with Dy, which has a larger magnetic moment and whose magnetization axis aligns with the crystal axis, we can control the magnetic susceptibility. This allows us to produce better biaxially oriented samples. However, RE123 materials such as Y123 (where RE represents rare earth atoms) form twin crystals that share the (110) plane, reducing the magnetic anisotropy in the a-b plane. Thus, the desired biaxial orientation may not always be achieved. In this study, we report on the relationship between the amount of twin structure formation and the Dy doping ratio.