压力对TlPb_xBaCa_3Cu_3O超导电性的影响  

INFLUENCE OF PRESSURE ON THE TIPb_xBaCa_3Cu_3O SUPERCONDUCTORS

作　　者：刘振兴[1] 林明柱[2] 唐明华[2] 孟宪仁 林振金 桑莉华 涂清云[2] 韩卫[2] 任燕如[2] 

机构地区：[1]中国科学院物理研究所 [2]北京师范大学物理系

出　　处：《高压物理学报》1989年第3期241-245,共5页Chinese Journal of High Pressure Physics

摘　　要：在本电阻温度T_(C zero)达120K的TIBaCa_3Cu_3O_y超导体中,掺入不同含量的Pb后,超导电性受到抑制,点阵常数减小。加压时,T_C先随压力 p的增加而上升,样品 1(x_(Pb)=0.05)的dT_(Cz)/dp=1.7K/GPa,样品2(x_(Pb)=0.5)的dT_(Cz)/dp=2.2 K/GPa。T_C的峰值随Pb的增加而减小。加压时,对由于 Pb的加入引起的Cu—O层的精细结构变化起到调制作用。Pb doped TIBaCaCuO compounds with nominal composition TlPbxBaCa3Cu3Oy have been synthesized and their physical properties have been studied. The pressure-dependence of Tc has also been studied. It is found that Tc increases with pressure at a rate of dTczero/dp=2.2 K/GPa for x=0. 5. which is higher than dTCzero/dp= 1.8 K/GPa for pure TIBaCaCuO.

关 键 词：铊 氧化物 超导体 超导电性 铅 

分 类 号：TM262.014[一般工业技术—材料科学与工程]