GROWTH OF HIGH-TC SUPERCONDUCTOR SINGLE-CRYSTALS AND THE EFFECT OF THERMOBARIC TREATMENT IN OXYGEN ON CRITICAL-TEMPERATURES

被引：9

作者：

EMELCHENKO, GA

ABROSIMOV, NV

BAZHENOV, AV

MASALOV, VM

ZHOKHOV, AA

KONONOVICH, PA

LOGVENOV, GY

KHASANOV, SS

机构：

[1] Institute of Solid State Physics, USSR Academy of Sciences, Chernogolovka

来源：

MATERIALS LETTERS | 1990年 / 9卷 / 2-3期

关键词：

D O I：

10.1016/0167-577X(90)90160-N

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By means of slow cooling from the melt, using a rotatable crucible, bulk single crystals of YBa2Cu3O7-δ, La2CuO4 and La1.85Sr0.15CuO4-δ were synthesized. To determine the crystallization conditions, phase diagrams of La2O3CuOCuO0.5 and YBa2Cu3O7-δ- BaO CuO with a solvent composition of BaO 28%-CuO 72% were studied in air. The bulk single crystals of YBa2Cu3O7-δ, measuring 3× 3× 1 mm3, exhibited a non-uniform oxygen distribution. Superconductivity in La1.85Sr0.15CuO4-δ was obtained by growth under non-equilibrium conditions. The influence of annealing at high oxygen pressure on the critical temperature Tc in the synthesized crystals was studied. © 1990.

引用

页码：96 / 100

页数：5

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