SUPERCONDUCTIVE PROPERTIES OF A YBA2CU3O7-DELTA SINGLE-CRYSTAL PREPARED BY CRYSTAL PULLING

被引：9
|
作者：
ODAGAWA, A
ENOMOTO, Y
YAMADA, Y
SHIOHARA, Y
TANAKA, S
机构：
[1] Superconductivity Research Laboratory, International Superconductivity Technology Center, Koto-Ku, Tokyo
来源：
PHYSICA C | 1993年 / 217卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(93)90816-9
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present anisotropic transport properties for a YBa2Cu3O7-delta single crystal prepared by the pulling method. The resistivity in the ab-plane (rho(ab)), for both the as-grown sample and the oxygen-annealed sample, shows good metallic behavior. The resistivity just above T(c) is approximately 2 x 10(-5) OMEGA cm. On the other hand, the resistivity along the c-axis (rho(c)) changes from semiconductor-like behavior for the as-grown sample to metallic behavior for the oxygen-annealed sample. In addition, any trace of Josephson characteristics is not observed for our samples. The metallic behavior of rho(c) suggests that the Cu-0 chain changes its conduction with hole doping, in addition to its role as a carrier source for the CuO2 planes.
引用
收藏
页码：222 / 226
页数：5
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