| Er1-xDyxNi2B2C体系中超导和磁性的共存和相互作用 |
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| 引用本文： | 曹世勋,秦晓玲,李平林,曹桂新,张金仓,森克德,西村克彦. Er1-xDyxNi2B2C体系中超导和磁性的共存和相互作用[J]. 低温物理学报, 2003, 25(4): 241-246 |
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| 作者姓名： | 曹世勋 秦晓玲 李平林 曹桂新 张金仓 森克德 西村克彦 |
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| 作者单位： | 上海大学理学院物理系,上海,200436;富山大学工学部,富山,930-8555,日本 |
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| 基金项目： | 国家自然科学基金,上海市纳米科技专项基金,上海市教委资助项目,上海市高等学校科技发展基金,10274049,50234020,0152nm027,,02AK42、No01A16,,,, |
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| 摘 要： | 本在2K～20K温区内系统地研究了Er1-xDyxNi2B2C体系中超导转变温度Tc的反铁磁转变温度TN随Dy掺杂含量x的变化．实验发现x=0．3和x=0．8附近的样品具有复杂的磁结构．这些洋品有两个磁转变温度(TN’和TN)．对于该体系发现了两个主要的特征：1)在x=0．3附近,超导被抑制,TN’出现一个小的峰值;2)在x=0．8附近,Tc出现一个低谷,TN’出现一个大的宽峰．TN’在x=0．3和x=0．8附近的异常来源于改系统中超导和磁性的共存和相互作用。
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| 关 键 词： | 超导电性 反铁磁 输运行为 |
COEXISTENCE AND INTERPLAY BETWEEN SUPERCONDUCTIVITY AND MAGNETISM IN Er1-xDyxNi2B2C SYSTEM |
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| Abstract. COEXISTENCE AND INTERPLAY BETWEEN SUPERCONDUCTIVITY AND MAGNETISM IN Er1-xDyxNi2B2C SYSTEM[J]. Chinese Journal of Low Temperature Physics, 2003, 25(4): 241-246 |
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| Authors: | Abstract |
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| Abstract: | The variations of the superconducting transition temperature Tc and the magnetic transition temperature TN against the Dy concentration x in Er1-xDyxNi2B2C system were systematically investigated in the temperature range from 2K to 20K. It is found that the magnetic structures are complicated in the samples near x=0.3 and x=0.8. These samples have two magnetic transition temperatures (TN ′ and TN). Two features have been observed; 1) near x=0.3, superconductivity is depressed and TN ′ showed a small peak, 2) around x=0.8, Tc showed a valley and TN ′ showed a large broad peak. These anomalies of Tc at x=0.3 and near x=0.8 originates from the coexistence and interplay between superconductivity and magnetism in this system. |
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| Keywords: | superconductivity ferromagnetism transport properties |
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