摘要
用２００ＫｅＶ质子，４００ＫｅＶ和８ＭｅＶ电子分别辐照ＹＢａＣｕＯ高Ｔｃ超导材料，其影响是不同的．质子注入使零电阻温度从８６．７Ｋ提高到８９．８Ｋ，而剂量为２．２５×１０１４电子／ｃｍ２的８ＭｅＶ的电子辐照却使超导体的零电阴温度下降３Ｋ左右．当电子辐照剂量为１．３５×１０１５ｅ／ｃｍ２时，超导体变成绝缘体．用高分解电镜对４００ｋｅＶ的电子辐照分况进行实地在线研究，发现当剂量到１．０×１０２６ｅ－／ｃｍ２时，氧化物超导体中的品相出现非品化，而其原来为非品区域处处出现有序化．
The YBaCuO high To superconductor has been irradiated by 200keV proton,400keV electron and 8MeV electron respectively. We have found irradiation effects were different. The transistion temperature (zero risistance) Tco of the YBaCuO increase from 86. 7K to 89. 8K after proton bombardments, but the Tco of the YBaCuO sample decrease about 3K after a fluence of 8MeV, 2. 25 X 1014e- /cm2 bombardments and become insulator after 1. 35 X 1015e- /cm2 bombardments. When another sample irradiated by a fluence of 400 keV, 1. OX 1026 e-/cm2. The crystal phase in the sample has been changed into amorphous phase,whereas the amorphous phase has been changed into crystal phase.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
1994年第2期30-34,共5页
Journal of Nanjing Normal University(Natural Science Edition)
基金
江苏省教委资助
关键词
高TC
超导体
辐照
氧化物
YBCO
Superconducting compounds
Superonducting transition temperature
Material radiation effects
Electron beams
