节点文献
YBa2Cu4O8/La2/3Ca1/3MnO3/YBa2Cu4O8异质结中的超导转变温度
Superconducting Transition Temperature in YBa2Cu4O8/La2/3Ca1/3MnO3/YBa2Cu4O8 Heterostructure
【摘要】 采用对靶溅射技术制备了YBa2Cu4O8/La2/3Ca1/3MnO3/YBa2Cu4O8(Y-124/LCMO/Y-124)异质结,研究了超导转变温度(TC)随LCMO层厚度(dL)的振荡行为。当dL>dLCR时,TC-dL曲线表现出清晰的非单调行为,而金属-绝缘体转变温度(TMI)仅当dL>dLCR时才能观测到。Y-124/LCMO/Y-124系统中所存在的这种对中间层的依赖关系,显示了铁磁和超导耦合间强烈的相互作用。
【Abstract】 YBa2Cu4O8/La2/3Ca1/3MnO3/YBa2Cu4O8(Y-124/LCMO/Y-124) heterostructure was prepared by facing-target sputtering technique.The oscillatory superconducting transition temperature(TC) was observed when the thickness of LCMO dL is larger than the critical thickness dLCR.The metal-insulator transition temperature(TMI) can only be detected at dL> dLCR.The dependence on the spacer layer in LCMO/Y-124 systems suggests strongly the interplay of ferromagnetic and superconducting couplings.
【关键词】 高温超导薄膜;
庞磁电阻;
异质结;
层间耦合;
稀土;
【Key words】 high-T_C films; colossal magnetoresistance; heterostructure; interlayer coupling; rare earths;
【Key words】 high-T_C films; colossal magnetoresistance; heterostructure; interlayer coupling; rare earths;
【基金】 山东省教育厅科技攻关计划(03A05);香港研究资助局基金;中国博士后科学基金资助
- 【文献出处】 中国稀土学报 ,Journal of The Chinese Rare Earth Society , 编辑部邮箱 ,2005年05期
- 【分类号】TB34;
- 【下载频次】78