OXYGEN CONTROL IN BI2SR2CA1CU2OX SUPERCONDUCTING THIN-FILMS BY ACTIVATED OXYGENS

被引：8

作者：

TAKEUCHI, K

KAWASAKI, M

YOSHIMOTO, M

SAITO, Y

KOINUMA, H

机构：

[1] Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Yokohama

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1990年 / 29卷 / 01期

关键词：

Activated oxygen; Bi-Sr-Ca-Cu-O; N[!sub]2[!/sub]O; Oxygen control; Superconducting film;

D O I：

10.1143/JJAP.29.L70

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Activated oxygens were generated by various methods to compare their effect on the control of oxygen stoichiometry in Bi2Sr2Ca1Cu2Oxsuperconducting thin films. The treatment of a film with an oxygen plasma or ozone at 400°C decreased the Tconset of the film by as much as 20 K from untreated film as it was in the case of film treatment in atmospheric oxygen under UV light irradiation. On the other hand, films exposed to UV light irradiation in the presence of N2O (400 Torr) increased their Tconset to 100 K by about 20 K. These Tcchanges accompanied the change in the c-axis lattice constant. The lattice of the specimens with Tconset of 60 K was smaller than that of the untreated films, while the specimens with Tconset of about 100 K had a stretched c-lattice. Thus, the oxygen content or hole concentration in Bi2Sr2Ca1Cu2Oxfilms can be controlled at a relatively low temperature and its effect is reflected in the changes of lattice constant and Tc. © 1990 IOP Publishing Ltd.

引用

页码：L70 / L72

页数：3

共 9 条

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