| 倾斜生长Tl_2Ba_2CaCu_2O_8超导薄膜的I-V曲线及快速反应特性 |
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| 引用本文： | 周铁戈,胡雅婷,左涛,顾静,谢清连,方兰,赵新杰,阎少林.倾斜生长Tl_2Ba_2CaCu_2O_8超导薄膜的I-V曲线及快速反应特性[J].低温与超导,2007(5). |
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| 作者姓名： | 周铁戈 胡雅婷 左涛 顾静 谢清连 方兰 赵新杰 阎少林 |
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| 作者单位： | 南开大学电子科学系 天津300071 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(2006CB601006)，国家高技术研究发展计划(863)新材料领域(2006AA03Z213)，高等学校博士学科点专项科研基金(20050055028)，南开大学学生创新基金 |
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| 摘 要： | 在10mm长、3mm宽的斜切LaA lO3衬底上制备出不同厚度的Tl2Ba2CaCu2O8(Tl-2212)超导薄膜。对薄膜的I-V特性进行测量,其临界电流密度小于正常生长的Tl-2212超导薄膜。对薄膜通过脉冲方波进行快速反应特性的测量,结果表明:倾斜生长的Tl-2212超导薄膜在一个电压脉冲的作用下,产生宽度仅为μs量级的大电流脉冲,然后变为正常态。这和正常生长的超导薄膜不同,前者没有经过发热和升温的过程。利用这一特性可以制作高速高温超导开关和快速反应限流器等。
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| 关 键 词： | 约瑟夫森效应 Tl2Ba2CaCu2O8超导薄膜 高温超导开关 限流器 |
I-V curve and quick-reaction property of misaligned Tl_2Ba_2CaCu_2O_8 films |
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| Zhou Tiege,Hu Yating,Zuo Tao,Gu Jing,Xie Qinglian,Fang Lan,Zhao Xinjie,Yan Shaolin.I-V curve and quick-reaction property of misaligned Tl_2Ba_2CaCu_2O_8 films[J].Cryogenics and Superconductivity,2007(5). |
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| Authors: | Zhou Tiege Hu Yating Zuo Tao Gu Jing Xie Qinglian Fang Lan Zhao Xinjie Yan Shaolin |
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| Abstract: | Misaligned Tl2Ba2CaCu2O8(Tl-2212) superconducting thin films were successfully fabricated on 10mm long and 3mm wide vicinal LaAlO3 substrates.I-V characteristic curve of the film was recorded by standard four-point technique.The critical current density of the as-grown film is less than normal Tl-2212 films.A pulse voltage was applied to the film to investigate the quick-reaction properties.The results show that large currents of only several μs can flow the film,after which the film was in normal state.It is different from the situation in normal films;the former does not experience a warming up process.Taking advantage of this property,rapid HTS switches or current limiters can be manufactured. |
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| Keywords: | Josephson effect Tl-2212 superconducting thin film HTS switch Current limiter |
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