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EuSr2Ru1-xTaxCu2O8中Ta替代效应
引用本文:方明虎,林杨帆,鲁俊生,张国芳,贺 青,王杭栋. EuSr2Ru1-xTaxCu2O8中Ta替代效应[J]. 物理学报, 2004, 53(3): 927-931
作者姓名:方明虎  林杨帆  鲁俊生  张国芳  贺 青  王杭栋
作者单位:(1)南阳师范学院物理系,南阳 473061; (2)浙江大学物理系,杭州 310027; (3)浙江万里学院基础部,宁波 315100
基金项目:国家科学技术部超导973项目(批准号:G1999064602)和国家教育部优秀青年教师基金资助的课题.
摘    要:通过对EuSr2Ru1-xTaxCu2O8 (x=0.0, 0.1, 0.2, 0.5和1.0)体系的结构、电阻和磁化强度的观测,发现EuSr2RuCu2O8(x=0.0)样品在130.2K以下呈现铁磁有序,在35K时发生了超导转变,并呈现典型的欠掺杂高温超导体特征;随着Ta对Ru替代浓度x值的增加,铁磁相变温度和超导临界温度均下降关键词:高温超导电性铁磁有序Ru-Cu氧化物

关 键 词:高温超导电性  铁磁有序  Ru-Cu氧化物
收稿时间:2003-04-22

Substitution effect of Ta in EuSr2Ru1-xTaxCu2O8 system
Fang Ming-Hu,Lin Yang-Fan,Lu Jun-Sheng,Zhang Guo-Fang,He Qing and Wang Hang-Dong. Substitution effect of Ta in EuSr2Ru1-xTaxCu2O8 system[J]. Acta Physica Sinica, 2004, 53(3): 927-931
Authors:Fang Ming-Hu  Lin Yang-Fan  Lu Jun-Sheng  Zhang Guo-Fang  He Qing  Wang Hang-Dong
Abstract:The measurements on the structure, resistance and magnetization were carried out for EuSr2Ru1-xTaxCu2O8 (x=0.0, 0.1, 0.2, 0.5 and 1.0) samples. It is found that the EuSr2RuCu2O8 compound exhibits a ferromagnetic order of Ru moments below Tc=130.2K, and becomes superconducting at a much lower temperature Tc=35K, and shows the typical characteristics of underdoped high-Tc superconductors. The ferromagnetic transition temperature and superconducting transition temperature decrease with increasing the substitution concentration x value of Ta for Ru. The effect of element substitution, the coexistence of magnetism and superconductivity in this system are discussed in detail.
Keywords:high-Tc superconductivity   ferromagnetic order   Ru-Cu oxides
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