Superconducting Transition Temperature in YBa_2Cu_4O_8/La_(2/3)Ca_(1/3)MnO_3/YBa_2Cu_4O_8 Heterostructure  

作　　者：赵昆 黄康权 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China,International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China [2]Department of Physics, Chinese University of Hong Kong, Hong Kong, China

出　　处：《Journal of Rare Earths》2006年第1期81-84,共4页稀土学报（英文版）

基　　金：ProjectsupportedbyHongKongResearchGrantCouncil,andChinaPostdoctoralScienceFoundation

摘　　要：YBa2Cu4O8/La2/3 Ca1/3 MnO3/YBa2Cu4O8 （ Y-124/LCMO/Y- 124） heterostructure was prepared by facing-target sputtering technique. The oscillatory superconducting transition temperature was observed when the thickness of LCMO d L is larger than critical thickness d L^CR. The metal-insulator transition temperature can only be detected at d L 〉 d L^CR. The dependence on the spacer layer in LCMO/Y-124 systems suggests strongly the interplay of ferromagnetic and superconducting couplings.YBa2Cu4O8/La2/3 Ca1/3 MnO3/YBa2Cu4O8 （ Y-124/LCMO/Y- 124） heterostructure was prepared by facing-target sputtering technique. The oscillatory superconducting transition temperature was observed when the thickness of LCMO d L is larger than critical thickness d L^CR. The metal-insulator transition temperature can only be detected at d L 〉 d L^CR. The dependence on the spacer layer in LCMO/Y-124 systems suggests strongly the interplay of ferromagnetic and superconducting couplings.

关 键 词：high- Tc films colossal magnetoresistance HETEROSTRUCTURE interlayer coupling rare earths 

分 类 号：O511.4[理学—低温物理]