THERMAL-EXPANSION OF ORTHORHOMBIC AND TETRAGONAL PHASES OF THE HIGH T(C) SUPERCONDUCTORS RE1BA2CU3OY (RE = Y, GD, DY)

被引：6

作者：

PRAKASH, OM ^{[1
]}

RAO, A ^{[1
]}

PRAKASH, O ^{[1
]}

DHEER, PN ^{[1
]}

机构：

[1] INDIAN INST TECHNOL,DIV MAT SCI,BOMBAY 400076,INDIA

来源：

PRAMANA-JOURNAL OF PHYSICS | 1993年 / 41卷 / 05期

关键词：

THERMAL EXPANSION; HIGH TEMPERATURE SUPERCONDUCTORS; DISCONTINUITY IN ALPHA; GROWTH CONDITIONS; IODOMETRIC TITRATION;

D O I：

10.1007/BF02847448

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the coefficient of linear thermal expansion alpha have been carried out for the orthorhombic and tetragonal phases of RE1Ba2Cu3Oy(RE = Y, Gd, Dy) compounds using a high resolution capacitance dilatometer in the temperature range 77-300 K. All the superconducting samples exhibit a jump DELTAalpha at their respective transition temperatures, T(c). Evidences of, sample-to-sample variation in alpha values and dependence of DELTAalpha on the sample preparation conditions, have been obtained. The non-superconducting samples, in general, exhibit lower values of alpha possibly because of lowering of oxygen content.

引用

页码：421 / 428

页数：8

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