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块体金属玻璃Zr46.75Ti8.25Cu7.5Ni10Be27.5的超导与负电阻温度系数
引用本文:李 勇,闻 平,刘振兴,景秀年,王万录,白海洋. 块体金属玻璃Zr46.75Ti8.25Cu7.5Ni10Be27.5的超导与负电阻温度系数[J]. 物理学报, 2004, 53(3): 844-849
作者姓名:李 勇  闻 平  刘振兴  景秀年  王万录  白海洋
作者单位:(1)中国科学院物理研究所,北京 100080; (2)重庆大学应用物理系,重庆 400044; (3)重庆大学应用物理系,重庆 400044;中国科学院物理研究所,北京 100080
基金项目:国家自然科学基金(批准号: 50171075, 50225101和50031010)资助的课题.
摘    要:测量了块体金属玻璃Zr46.75Ti8.25Cu7.5Ni10Be27.5在退火前后其电阻值随温度的变化,测量的温度范围为1.5—300K.样品在退火前后都发现有超导现象.零磁场下其超导转变温度Tc分别为1.84和3.76K.在5—300K温度范围内,原始样品具有负的电阻温度系数.如果取Zr, Ti, Cu, Ni及Be分别贡献出1.5, 1.5, 0.5, 0.5及两个传导关键词:块体金属玻璃超导电阻温度系数

关 键 词:块体金属玻璃  超导  电阻温度系数
收稿时间:2003-04-17

Superconductivity and negative temperature coefficient of the resistivity of bulk metallic glass Zr46.75Ti8.25Cu7.5Ni10Be27.5
Li Yong,Wen Ping,Liu Zhen-Xing,Jing Xiu-Nian,Wang Wan-Lu and Bai Hai-Yang. Superconductivity and negative temperature coefficient of the resistivity of bulk metallic glass Zr46.75Ti8.25Cu7.5Ni10Be27.5[J]. Acta Physica Sinica, 2004, 53(3): 844-849
Authors:Li Yong  Wen Ping  Liu Zhen-Xing  Jing Xiu-Nian  Wang Wan-Lu  Bai Hai-Yang
Abstract:Electrical-resistivity measurements between 1.5 K and 300 K were performed on the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glasses (BMGs) before and after annealing. Results of the superconducting transition temperature measurements are presented for the BMG Zr46.75Ti8.25Cu7.5Ni10Be27.5. The superconducting critical temperature Tc is 1.84K for the as-prepared metallic glassy sample and 3.76K for the annealed sample at zero magnetic fields. The as-prepared metallic glassy sample exhibits negative temperature coefficient of the resistivity in the temperature range from 5 to 300 K. The negative temperature coefficient of the resistivity of the as-prepared metallic glassy sample can be reasonably understood with the extended Faber-Ziman theory in terms of the diffraction model for metallic glasses if it is assumed that Zr, Ti, Cu, Ni and Be contribute 1.5, 1.5, 0.5, 0.5 and 2 conduction electrons, respectively. The R(T) of the BMG Zr46.75Ti8.25Cu7.5Ni10Be27.5 over the temperature range from 5 to 300 K was analyzed by fitting it to a polynomial using a least-squares procedure.
Keywords:bulk metallic glasses   superconductivity   temperature coefficient of the resistivity
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