Growth and electrical transport characteristics of Bi2Sr2Ca1Cu2Ox and Bi2Sr2CuOx single-crystal whiskers using tellurium-doped precursors

被引：13
作者：
Nagao, M
Sato, M
Maeda, H
Kim, S
Yamashita, T
机构：
[1] Kitami Inst Technol, Dept Mat Sci, Kitami, Hokkaido 0908507, Japan
[2] Japan Sci & Technol Corp, CREST, Tsukuba, Ibaraki 3050047, Japan
[3] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2002年 / 377卷 / 03期
基金：
日本学术振兴会;
关键词：
Bi2201; Bi2212; Bi2223; whisker; crystal growth; intrinsic Josephson effect;
D O I：
10.1016/S0921-4534(02)01252-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Bi2Sr2CaCu2Ox (Bi2212) and Bi2Sr2CuOx (Bi2201) single-crystal whiskers were grown by annealing sintered Tedoped Bi-Sr-Ca-Cu-O precursors. The growth of Bi2212 or Bi2201 whiskers definitely depends on the Ca content of precursors; the optimal composition is Ca-rich Bi2Sr2Ca2Cu2Te0 O-50(x) for Bi2212 and Bi2Sr2CaCuTe0 50Ox for Bi2201. In the precursors Te ions exist in the phase of (SrCa)(3)TeO6. The whiskers contain no Te element. The Bi2212 whiskers have a critical temperature of about 80 K and the critical current with a multibranched structure of the current voltage characteristics due to the intrinsic Josephson junctions along the c-axis is quite uniform, showing that the whiskers are homogeneous and of good quality. The B12201 whiskers show semiconducting resistance with no superconducting transition down to 4.2 K. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：260 / 266
页数：7
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