YBa_2Cu_(3-x)Gd_xO_(7-δ)的X射线衍射研究  

X-ray diffraction studies on Gd doped YBa_(2-x)Eu_xCu_3O_(7-δ) Superconductors

作　　者：徐胜[1] 

机构地区：[1]南京大学固体微结构物理国家重点实验室,江苏南京210093

出　　处：《常熟理工学院学报》2006年第2期87-90,共4页Journal of Changshu Institute of Technology

基　　金：国家自然科学基金(10474032;90201039)资助项目

摘　　要：用传统的固相反应法制备了掺杂稀土元素Gd的YBa2Cu3-xGdxO7-δ多晶粉末样品,并对YBa2Cu3-xGdxO7-δ结构进行X射线衍射研究。详细研究了Gd掺杂对YBa2Cu3O7-δ(Y-123)的结构与输运性质的影响。借助Rietveld方法,对不同掺杂的样品进行了细致的结构分析,并从结构的变化分析了掺杂对自旋隙产生的影响。对Gd3+离子磁掺杂自旋隙特征的研究说明自旋隙温度很大程度地依赖平面间的反铁磁关联配对的加强。Gd - doped polycrystallized YBa2Cu3-xGdxO7-δ compounds with x = 0.15 were synthesized using the solid - state reaction technique. We analyzed the structural parameters for all Gd doped YBa2Cu3-xGdxO7-δ by X- ray diffraction with Rietveld refinement supported GSAS program. And we studies the doping effect on the spin gap temperatue which is strongly determined by the effective interplane coupling enhanced by strong spin antiferromagnetic correlation.

关 键 词：GD掺杂 x-ray衍射 Rieveld精修 自旋隙 

分 类 号：O511[理学—低温物理]