摘要
研究了高温热处理对ＢＰＳＣＣＯ２２２３超导体高温电阻率的影响，观察到电阻率的奇异变化．实验结果表明，高温氮气退火，除ＢｉＯ层外，ＣｕＯ层也发生脱氧，同时伴随金属离子的运动．氧含量和氧重布及金属离子的运动引起了ＢＰＳＣＣＯ２２２３相微结构的多样性．
Abstract The effects of heat treatments on the resistivity of BPSCCO 2223 superconductor were studied. The anomalous behavior in high temperature resistivity was observed. It was shown that upon annealing in N 2 at high temperatures, the oxygen escaped not only from Bi O layer but also from Cu O layer accompanied with the movement of metal ions. The change in oxygen content and the redistribution of oxygen and metal atoms diversified the microstructure of BPSCCO 2223 phase.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第11期1906-1911,共6页
Acta Physica Sinica
