CHARACTERIZATION OF THE HIGH-Tc PHASE AND ITS METAMORPHIC PHASES, Ba2YCu3O7 - delta .

被引：0

作者：

Ishikawa, M. ^{[1
]}

Takabatake, T. ^{[1
]}

Nakazawa, Y. ^{[1
]}

机构：

[1] Univ of Tokyo, Tokyo, Jpn, Univ of Tokyo, Tokyo, Jpn

来源：

Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics | 1987年 / 148卷 / 1-3期

关键词：

BARIUM COMPOUNDS - Phase Transitions - CERAMIC MATERIALS - ELECTRIC CONDUCTIVITY - SPECIFIC HEAT;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Sintered samples of good quality of the four different phases, Ba//2YCu//3O//7// minus // delta , were reinvestigated by means of resistivity, susceptibility and specific heat experiments. The specific heat of the 90 K superconducting phase revealed a distinct jump at T//c of DELTA C//p/T//c equals 53 mJ/molK**2 and in the superconducting state a small but finite value of gamma of about 8 mJ/molK**2 was discerned at low temperatures. Variation of these parameters in its metamorphic phases with different oxygen content is discussed in relation to other physical properties and sample quality.

引用

页码：332 / 335

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