Thin Flim Squids of High TC Materials

高TC材料薄鱿鱼

• 批准号: 9011618
• 负责人: Carmine Vittoria
• 金额: $ 34.17万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9011618&HistoricalAwards=false
• 关键词: Thin; Flim; Squids; TC; Materials

We propose to fabricate and test microwave devices based upon the non-linear voltage current characteristics of Josephson junctions. In particular one and two-hole microwave SQUID (Supercon- ducting Quantum Interference Detectors) devices and planar microwave sensors utilizing the non-linear characteristics of the junction will be fabricated. The junctions will be ion beam milled to tolerances of 100A in order to take advantage of the latest advances in etching techniques. Only planar devices with the electrical ground in the plane of the film will be studied. Laser deposited YBCO films will be used. We will derive fundamental relationships between the critical current, Ic, and resistance, R, and the fabrication parameters of the junction in order to estimate microwave properties in the junctions. In addition to the calculation of D.C. voltage-current characteristics of a junction in the presence of a microwave field, microwave reflection (S11) and transmission (S21) coefficients will be theoretically calculated for the first time. Measured performance of SQUID devices and microwave planar devices will be modeled in terms of the fluxoid dynamics and free energy of the junction or weak links.

我们建议制作和测试微波器件 基于非线性电压电流 约瑟夫森结的特性。 特别是 单孔和双孔微波SQUID（Supercon- 量子干涉探测器）设备 以及利用非线性的平面微波传感器 将制造结的特性。 的 结将被离子束研磨到公差为 100A，以利用最新的 蚀刻技术的进步。 仅平面设备 在膜的平面中的电接地将 被研究。 激光沉积YBCO薄膜将是 采用 我们将推导出 临界电流Ic和电阻R，以及 结的制造参数，以便 估计结中的微波特性。 在 直流电压-电流计算的补充 一个结的特性， 微波场、微波反射（S11）和 透射（S21）系数理论上为 第一次计算。 测量的性能 SQUID器件和微波平面器件将 根据磁通量动力学和自由 连接点或薄弱环节的能量。