RF-Field-Driven Superconducting Quantum Interference Devices

射频场驱动超导量子干涉装置

基本信息

  • 批准号:
    12450135
  • 负责人:
  • 金额:
    $ 9.28万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2000
  • 资助国家:
    日本
  • 起止时间:
    2000 至 2001
  • 项目状态:
    已结题

项目摘要

The purpose of this study is to investigate the properties of RF-field-driven DC-SQUID (RFDS) in both simulation and experiments for future possible applications. In simulation, we have obtained the dependence of device properties upon (i) frequency of the signal, (ii) power of the signal, (iii) offset DC field, and (iv) operation margins and power gain. Next we fabricated a DC-SQUID using YBa_2Cu_3O_<7-δ> grain boundary Josephson junctions (YBCO-GBJJs) integrated with an H-shaped antenna. The results agreed with numerical ones at low power region. According to these results, we developed a coplanar-type resonator to apply RF signal to a superconducting quantum interference device (SQUID) magnetically. We fabricated a DC-SQUID using YBCO-GBJJs again, and mounted it on the resonator. By applying SF signal of 20GHz to the resonator, we observed Shapiro steps on ;the current-voltage characteristics of the SQUID. The dependence of Shapiro steps upon DC offset field agreed with the numerical results. In comparison with our previous device, the new method has three benefits: 1. We can design a resonator and a SQUID independently. 2. Hence, we can utilize wide-band frequencies by changing the resonator. 3. Also we can utilize the same SQUID for wide-band frequencies, which means we can systematically investigate the dependence of the device properties upon the frequency. Finally we extended the device configuration from two-junction SQUID to three-junction SQUID. Analytical and numerical results showed that the three-junction SQUID would generate a zero-crossing Shapiro step by applying multi-phase RF signals. Hence, the extended RF-Field-Driven SQUID would be applicable to programmable Josephson voltage standards.
本研究旨在探讨射频场驱动直流量子干涉仪(RFDS)的特性,并为未来的应用提供理论与实验依据。在模拟中,我们已经获得了器件特性对(i)信号频率、(ii)信号功率、(iii)偏移直流场以及(iv)操作裕度和功率增益的依赖性。然后我们利用YBa_2Cu_3O_<7-δ>晶界约瑟夫森结(YBCO-GBJJ)和H形天线制作了DC-SQUID。在低功率区,计算结果与数值计算结果基本一致。根据这些结果,我们研制了一种共面型谐振腔,用于将射频信号以磁性方式施加到超导量子干涉器件(SQUID)上。我们再次用YBCO-GBJJ制作了DC-SQUID,并将其安装在谐振腔上。通过对SQUID谐振腔施加20 GHz的SF信号,观察到了SQUID的电流-电压特性的Shapiro阶跃。Shapiro台阶对直流偏置场的依赖关系与数值结果一致。与我们以前的设备相比,新方法有三个好处:1。我们可以独立设计一个谐振腔和一个SQUID。2.因此,我们可以通过改变谐振器来利用宽带频率。3.此外,我们可以利用相同的SQUID的宽带频率,这意味着我们可以系统地研究设备的性能对频率的依赖性。最后,我们将器件结构从二结SQUID扩展到三结SQUID。分析和数值计算结果表明,三结SQUID在多相射频信号作用下会产生过零夏皮罗阶跃。因此,扩展的RF场驱动SQUID将适用于可编程约瑟夫森电压标准。

项目成果

期刊论文数量(38)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y. Mizugaki, J. Chen, K. Nakajima, and T. Yamashita: ""Flux-Quantum Transitions in a Three-Junction SQUID Controlled by Two RF Signals""IEICE Transactions on Electronics. vol. E85-C(to be published). (2002)
Y. Mizugaki、J. Chen、K. Nakajima 和 T. Yamashita:““由两个 RF 信号控制的三结 SQUID 中的通量量子跃迁””IEICE Transactions on Electronics。
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Y.Mizugaki, J.Chen, K.Nakajima, T.Tamashita: "Flux-Quantum Transitions in a Three-Junction SQUID Controlled by Two RF Signals"IEICE Transactions on Electronics. E85-C・3(発表予定). (2002)
Y.Mizugaki、J.Chen、K.Nakajima、T.Tamashita:“由两个 RF 信号控制的三结 SQUID 中的通量量子跃迁”IEICE Transactions on Electronics(即将公布)。 2002年)
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T. Kondo, Y. Mizugaki, K, Saito, K. Nakajima, and T. Yamashita: ""Switching Device Based on RF-Field-Driven High-Tc SQUID""IEICE Transactions on Electronics. vol. E-84C. 55-60 (2001)
T. Kondo、Y. Mizugaki、K、Saito、K. Nakajima 和 T. Yamashita:“基于 RF 场驱动的高温 SQUID 的开关器件”“IEICE Transactions on Electronics。
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    0
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H.B.Wang,Y.Aruga,J.Chen,K.Nakajima,T.Yamashita,and P.H.Wu: "Individual Shapiro steps observed in resistively-shunted intrinsic Josephson junctions on Bi_2Sr_2CaCu_2O_<8+x> single crystal"Appl.Phys.Lett.. 77・7. 1017-1019 (2000)
H.B.Wang、Y.Aruga、J.Chen、K.Nakajima、T.Yamashita 和 P.H.Wu:“在 Bi_2Sr_2CaCu_2O_<8+x> 单晶上的电阻分流本征约瑟夫森结中观察到的单独夏皮罗阶跃”Appl.Phys.Lett .. 77・7. 1017-1019 (2000)
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T. Kondo, Y. Mizugaki, J. Chen, K. Nakajima, and T. Yamashita: ""Microwave Induced Steps in RF-Field-Driven DC SQUID and its Potential Applications""IEEE Transactions on Applied Superconductivity. vol. 11. 900-903 (2001)
T. Kondo、Y. Mizugaki、J. Chen、K. Nakajima 和 T. Yamashita:“射频场驱动 DC SQUID 中的微波感应阶跃及其潜在应用””IEEE 应用超导汇刊。
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YAMASHITA Tsutomu其他文献

YAMASHITA Tsutomu的其他文献

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{{ truncateString('YAMASHITA Tsutomu', 18)}}的其他基金

Philological study of the classical texts of traditional medicine in India with special attention to the Sanskrit medical works attributed to Vagbhata and his disciple.
对印度传统医学经典文本的语言学研究,特别关注瓦格巴塔及其弟子的梵文医学著作。
  • 批准号:
    23520073
  • 财政年份:
    2011
  • 资助金额:
    $ 9.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Study on the Theory and Practice of Traditional Medicine in India
印度传统医学理论与实践研究
  • 批准号:
    20500878
  • 财政年份:
    2008
  • 资助金额:
    $ 9.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
An Investigation of the Historical Developments of Traditional Medicine in India
印度传统医学历史发展考察
  • 批准号:
    16500634
  • 财政年份:
    2004
  • 资助金额:
    $ 9.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Superconducting detectors with high-speed and high-resolution at THz band.
太赫兹波段高速高分辨率超导探测器。
  • 批准号:
    11555106
  • 财政年份:
    1999
  • 资助金额:
    $ 9.28万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Study on the ultra low resistivity phenomenon of hetero structure organic thin films
异质结构有机薄膜超低电阻率现象的研究
  • 批准号:
    05452182
  • 财政年份:
    1993
  • 资助金额:
    $ 9.28万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)

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