Improvement of superconducting properties by BaTiO3 doping into ErBa2Cu3O7-δ films

被引：3
作者：
Shingai, Y.
Abe, T.
Mukaida, M.
Kita, R.
Yoshida, Y.
Ichinose, A.
Horii, S.
Matsumoto, K.
Saito, A.
Yamada, K.
Mori, N.
机构：
[1] Kyushu Univ, Mukaida Lab, Dept Mat Phys & Chem, Grad Sch Engn,Nishi Ku, Fukuoka 8190395, Japan
[2] Yamagata Univ, Yonezawa, Yamagata 9928510, Japan
[3] Shizuoka Univ, Hamamatsu, Shizuoka 4328651, Japan
[4] Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[5] CRIEPI, Kanagawa 2400196, Japan
[6] Univ Tokyo, Bunkyo Ku, Tokyo 1138685, Japan
[7] Kyoto Univ, Sakyo Ku, Kyoto 6068510, Japan
[8] JST, CREST, Kawaguchi, Saitama 3320012, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2006年 / 445卷
关键词：
ErBa2Cu3O7-delta films; BaTiO3; doping; low surface resistance;
D O I：
10.1016/j.physc.2006.05.037
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have improved surface resistance (R-S) properties of ErBa2Cu3O7-delta (ErBCO) films by using BaTiO3 (BTO) doping (BTO + ErBCO). The as-grown BTO + ErBCO films did not have enough carriers. We solve this problem by using O-3 + O-2 as background gas during the growth of BTO + ErBCO films. Then, O-3 + O-2 gas is useful to grow BTO + ErBCO films with superior superconducting properties. The R-S of a 2 wt.%BTO + ErBCO film is the lowest in BTO + ErBCO films grown in this study. This value is equal to that of a 1.5 wt.%BZO + ErBCO film. The microstructures of the 2 wt.%BTO + ErBCO film are observed by transmission electron microscopy (TEM). In the image, the BTO + ErBCO films did not have the same nanorods as observed in the BZO + ErBCO films against our expectation. However, precipitates that the BZO + ErBCO films do not have, are observed. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：841 / 844
页数：4
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