（La_（1－x）Sr_x）_2CuO_4高T_c单晶样品中Sr对其性质的影响  

EFFECT OF Sr ON THE PROPERTIES OF HIGH-T_c SINGLE CRYSTALLINE (La_(1-x)Sr_x)_2CuO_4

作　　者：袁松柳[1] 李建青[1] 

机构地区：[1]中国科学院等离子体物理研究所,强磁场实验室,武汉工学院基础部物理教研室

出　　处：《低温物理学报》1995年第3期233-237,共5页Low Temperature Physical Letters

摘　　要：实验上研究了（Ｌａ（１－ｘ）Ｓｒｘ）２ＣｕＯ４高Ｔｃ库晶样品的ｃ－轴正常态电阻同温度的关系以及Ｔｃ附近ｃ－轴电阻作为磁场和磁场取向的函数．结果表明，（１）随着Ｓｒ含量的增加，ｃ－轴正常态电阻从半导体行为变为金属行为，和（２）固有的各向异性随Ｓｒ含量的增加而逐渐变弱，这些意味着Ｓｒ掺杂在Ｌａ基系统中有利于Ｃｕ－Ｏ面间耦合的改善．Abstract The temperature dependence of c-axis normal state resistance as well as the c-axis resistance near Tc as a function of magnetic field and its orientation are experimentally studied for high-Tc single crystalline(La1-xSrx)2CuO4. It is shown that with the increase of x,(1)the.behavior of c--axis normal state resistance changes from semiconductor to metal3and (2) the intrinsic anisotropy weakens gradually. These mean that the coupling between Cu-O layers is improved by doping Sr in La-based system.

关 键 词：高TC 单晶样品 超导化合物 锶 超导性 

分 类 号：O513[理学—低温物理] TM263[理学—物理]