THE EFFECT OF HEAT-TREATMENT ENVIRONMENT ON THE SUPERCONDUCTING PROPERTIES OF PLASMA-SPRAYED YBA2CU3OY DEPOSITS

被引：7

作者：

GUDMUNDSSON, B

WANG, H

NEISER, RA

KATZ, B

HERMAN, H

SUENAGA, M

机构：

[1] SFA INC,LANDOVER,MD 20785

[2] BROOKHAVEN NATL LAB,UPTON,NY 11973

来源：

JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 05期

关键词：

D O I：

10.1063/1.345475

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Plasma-sprayed YBa2CU3Oy coatings consist of a nonsuperconducting tetragonal phase with an a/c ratio of 1/3 (c=11.61) in the as-sprayed condition. This phase is tentatively assigned to the solid solution Y1(Ba2-xYx) Cu3O 7+δ. Heat treatment of this phase at 930 °C/24 h in oxygen results in orthorhombic symmetry, an expansion of the c axis (11.66 Å), and the appearance of superconductivity. In this study it is shown that heat treatment in argon at 850 °C prior to the oxygen heat-treatment leads to a crystal structure which closely matches the desired YBa2Cu 3Oy (c=11.68), raises Tc, and narrows the transition width.

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页码：2653 / 2655

页数：3

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