Flux pinning properties in YBCO films with growth-controlled nano-dots and heavy-ion irradiation defects

被引：10
作者：
Sueyoshi, T. [1 ]
Kotaki, T. [1 ]
Uraguchi, Y. [1 ]
Suenaga, M. [1 ]
Makihara, T. [1 ]
Fujiyoshi, T. [1 ]
Ishikawa, N. [2 ]
机构：
[1] Kumamoto Univ, Dept Comp Sci & Elect Engn, Chuo Ku, 2-39-1 Kurokami, Kumamoto 8608555, Japan
[2] JAEA, Ibaraki 3191195, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2016年 / 530卷
基金：
日本学术振兴会;
关键词：
Critical current density; Flux pinning; Irradiation; Columnar defects; Nano-particles; HIGH-TEMPERATURE SUPERCONDUCTORS; YBA2CU3O7;
D O I：
10.1016/j.physc.2016.04.011
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In order to clarify the influence of size and spatial distribution of three-dimensional pinning centres (3D-PCs) on hybrid flux pinning, columnar defects (CDs) were installed by using 200 MeV Xe ions along the c-axis direction into quasi-multilayered films consisting of YBa2Cu3Oy layers and pseudo layers of BaSnO3. The positive effect of the BaSnO3 doping on the hybrid flux pinning stands out for the critical current density J(c) around B parallel to c in high magnetic field and/or inclined magnetic field off the c-axis, which is more remarkable for the multilayered film grown at higher temperature, possibly due to larger BaSnO3 nano-dots. In the case of the in-plane distributed BaSnO3 nano-dots, the J(c) around B parallel to ab is remarkably enhanced, whereas there is a detrimental effect on the J(c) around B parallel to c. These imply that the tuning of 3D-PCs is one of the keys to improve the J(c) at all magnetic field orientations for the hybrid flux pinning. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：72 / 75
页数：4
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