METASTABILITY OF SUPERCONDUCTING COMPOUNDS IN THE Y-BA-CU-O SYSTEM

被引：19
|
作者：
BROSHA, EL
DAVIES, PK
GARZON, FH
RAISTRICK, ID
机构：
[1] UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104
[2] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545
来源：
SCIENCE | 1993年 / 260卷 / 5105期
关键词：
D O I：
10.1126/science.260.5105.196
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Precision isothermal solution calorimetry was used to determine the standard-state enthalpy of formation of a number of phases in the Y-Ba-Cu-O system. An analysis of the data indicates that YBaCu4O8 is thermodynamically metastable under ambient conditions. Taken together with the results from previous investigations, these data show that all of the superconducting compounds in the Y-Ba-Cu-O system are thermodynamically metastable at low temperatures.
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页码：196 / 198
页数：3
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