DEPENDENCE OF STRUCTURAL AND SUPERCONDUCTING PROPERTIES OF AS-GROWN BI2SR2CA1CU2OX FILMS ON LOW-TEMPERATURE ANNEALING

被引：15

作者：

MIURA, S ^{[1
]}

YOSHITAKE, T ^{[1
]}

SHOHATA, N ^{[1
]}

SATOH, T ^{[1
]}

机构：

[1] NEC CORP LTD,RESOURCES & ENVIRONM PROTECT RES LABS,MIYAMAE KU,KAWASAKI,KANAGAWA 213,JAPAN

来源：

PHYSICA C | 1990年 / 165卷 / 3-4期

关键词：

Bismuth Compounds - Ceramic Materials - Crystals - Sputtering;

D O I：

10.1016/0921-4534(90)90198-N

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Epitaxial films of the Bi2Sr2Ca1Cu2Ox phase were prepared on MgO(100) substrates in situ by RF magnetron sputtering. The as-grown film showed a Tc onset of 92 K and a Tc end of 82 K. The superconducting properties and the c-axis lattice constant could be varied reversibly by annealing the film in various atmosphere at below 400°C. When the c-axis lattice constant was increased by about 0.2 Å, the Tc onset increased from 60 K to 93 K, suggesting that the Tc increased with decreasing oxygen content in the film. However further decrease of the oxygen content in the film caused the degradation of the Tc when the films were annealed in vacuum at above 250°C. © 1990.

引用

页码：241 / 246

页数：6

共 10 条

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