摘要
用TlNO_3在Tl-Ca-Ba-Cu-O体系中获得了超导转变温度120K以上、零电阻温度为108K的超导体。超导相可以用Z.Z.Sheng报道的2122相指标,其晶格常数是a=5.450A,b=5.447A,c=29.57A。
Superconducting phase Tl_2Ca_1 Ba_2Cu_2O_x (2122) with onset T_ over 120K and zero resistivity at 108K was prepared with thallium nitrite in the Tl CaBa-Cu-O system. The 2122 superconductor, which appears to be structurally related to Bi_2CaSr_2Cu_2O_(+δ), has a 5.450 A×5.447 A×29.57 A pseudotetragoral
subcell.
关键词
超导体
氧化物
起导电性
相分析
superconductivity
thallium nitrite
phase analysis
