Ba_(1-x)Sm_xFFeAs和Eu_(1-x)Sm_xFFeAs体系的超导电性研究

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摘要合成了具有ZrCuSiAs型结构的Ba1-xSmxFFeAs和Eu1-xSmxFFeAs两个体系不同掺杂组分的样品,并测量了它们的电阻率和磁化率.发现在BaFFeAs和EuFFeAs这两个体系中用稀土金属离子取代碱土金属离子能够压制其在电阻率行为上表现出的反常,并在样品中引入超导电性.名义组分为Ba0.5Sm0.5FFeAs的样品超导转变温度为54K,名义组分为Eu0.5Sm0.5FFeAs的样品超导转变温度为51K,这说明铁砷氟化物和与其结构相同的氧磷族元素化物具有相同的超导转变温度.

作者吴刚谢亚丽陈红钟旻刘荣华时丙才李秋菊王向锋吴涛闫亚军应剑俊陈仙辉

机构地区合肥微尺度物质科学国家实验室(筹)

出处《科学通报》 EI CAS CSCD 北大核心 2009年第8期1068-1070,共3页 Chinese Science Bulletin

基金国家自然科学基金(批准号:10774135) 国家高技术研究发展计划(编号:2006CB601001 2006CB922005)资助项目

关键词铁基氟化物超导电性自旋密度波(SDW)

分类号 O511 [理学—低温物理]

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Ba_(1-x)Sm_xFFeAs和Eu_(1-x)Sm_xFFeAs体系的超导电性研究

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