| EuSr2Ru1-xTaxCu2O8中Ta替代效应 |
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| 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 |
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| 作者姓名： | 方明虎 林杨帆 鲁俊生 张国芳 贺 青 王杭栋 |
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| 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 |
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| 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. |
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| 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
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| 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 |
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| 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 |
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| Authors: | Fang Ming-Hu Lin Yang-Fan Lu Jun-Sheng Zhang Guo-Fang He Qing Wang Hang-Dong |
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| 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. |
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| Keywords: | high-Tc superconductivity ferromagnetic order Ru-Cu oxides |
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