压力对HgBa_2Ca_2Cu_3O_（8＋y）超导转变温度的影响  

S PRESSURE EFFECT ON THE CRITICAL TEMPERATURE OF HgBa 2Ca 2Cu 3O 8+y

作　　者：韩翠英[1,2] 邵惠民[1,2] 林蔚[1,2] 宋巍[1,2] 贾顺连[1,2] 姚希贤[1,2] 

机构地区：[1]中国科学院物理研究所 [2]南京大学固体微结构物理实验室

出　　处：《高压物理学报》1996年第1期6-11,共6页Chinese Journal of High Pressure Physics

摘　　要：利用低温超高压装置，测量了Ｈｇ系样品ＨｇＢａ２Ｃａ２Ｃｕ３Ｏ８＋ｙ（Ｈｇ－１２２３）超导转变温度Ｔｃ在压力作用下的增强效应。压力最高达７．８ＧＰａ，超导起始转变温度常压下为１３０Ｋ，加压到５．４ＧＰａ时获得最高温度为１４０Ｋ。在５．４ＧＰａ以下获得ｄＴｃ／ｄｐ为１．８５Ｋ／ＧＰａ。The critical temperature T c of the superconductor HgBa 2Ca 2Cu 3O 8+ y (Hg 1223) sample is determined by four probe resistivity measurement under quasi hydrostatic pressure up to 7.8GPa. T c increases from 130K at ambient pressure to 141K under a pressure up to 5.4GPa.d T c/d p =1.85K/GPa at pressures below 5 4GPa.The moving of some oxygen atoms and the coupling between CuO 2 planes were used to analysed the pressure effect on T c of the high T c superconductors.

关 键 词：低温 超高压 Hg-1223 超导体 

分 类 号：TM262[一般工业技术—材料科学与工程]