Incorporation of double artificial pinning centers in YBa2Cu3O7-δ films

被引：9
|
作者：
Mele, P. [1 ,2 ]
Matsumoto, K. [1 ,2 ]
Horide, T. [2 ,3 ]
Ichinose, A. [2 ,4 ]
Mukaida, M. [2 ,5 ]
Yoshida, Y. [2 ,6 ]
Horii, S. [2 ,7 ]
Kita, R. [2 ,8 ]
机构：
[1] Kyushu Inst Technol, Dept Mat Sci & Engn, Tobata Ku, Kitakyushu, Fukuoka 8048550, Japan
[2] JST, CREST, Saitama, Japan
[3] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan
[4] CRIEPI, Yokosuka, Kanagawa, Japan
[5] Kyushu Univ, Dept Mat Sci & Engn, Fukuoka 812, Japan
[6] Nagoya Univ, Dept Elect Engn & Comp Sci, Nagoya, Aichi 4648601, Japan
[7] Univ Tokyo, Dept Appl Chem, Tokyo 1138654, Japan
[8] Shizuoka Univ, Grad Sch Sci & Technol, Shizuoka 4228529, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2008年 / 468卷 / 15-20期
关键词：
YBCO; artificial pinning center; Y2O3; doping; BaZrO3; J(c); vortex pinning;
D O I：
10.1016/j.physc.2008.05.228
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
YBa2Cu3O7-x + BaZrO3 + Y2O3 (YBCO + BaZrO3 + Y2O3) mixed films were prepared on SrTiO3/MgO substrates by pulsed-laser deposition from an YBCO + BaZrO3 target with a thin Y2O3 sector stuck on the top. The pinning properties for the double-doped YBCO + BaZrO3 + Y2O3 thin film were enhanced in comparison with a pure YBCO sample prepared in the same experimental conditions. The maximum global pinning forces F-p for the double-doped sample are 12.8 GN/m(3) at 77K. 46.3 GN/m(3) at 65K, and 122 GN/m(3) at 40K. In the double-doped sample, the angular dependence of J(c) showed a broad peak at B//c due to the flux pinning by c-axis correlated defects, combined with a plateau, due to the flux pinning by isotropic pinning centres. Consistently, both BaZrO3 nanorods parallel to the c-axis and Y2O3 nanoparticles randomly dispersed inside the YBCO matrix were observed in TEM images. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1631 / 1634
页数：4
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