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首页> 外文期刊>IEEE Transactions on Magnetics >Properties of the microwave SQUID with an YBaCuO point contact junction
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Properties of the microwave SQUID with an YBaCuO point contact junction

机译：具有YBaCuO点接触结的微波SQUID的性质

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摘要

A high-sensitivity microwave SQUID (superconducting quantum interference device), suitable for RF attenuation measurements, is constructed taking advantage of the low density of states of current carriers in high-T/sub c/ materials. The dynamics, the noise properties, and the sensitivity of the microwave SQUID are theoretically analyzed. The ultimate energy resolution of the waveguide SQUID is inversely proportional to the characteristic frequency omega /sub c/=R/sub q//L of the loop. omega /sub c/ is high for YBaCuO junctions at 4.2 K because of small leakage. A flux sensitivity of 4*10/sup 4-6/ phi /sub 0// square root Hz has been achieved, which is in good agreement with the theoretical predictions.
机译：利用高T / sub c /材料中电流载流子态的低密度，构造了适用于RF衰减测量的高灵敏度微波SQUID（超导量子干涉装置）。理论上分析了微波SQUID的动力学，噪声特性和灵敏度。波导SQUID的最终能量分辨率与环路的特征频率ω/ sub c / = R / sub q // L成反比。由于泄漏很小，YBaCuO结的ω/ sub c /在4.2 K下较高。磁通灵敏度为4 * 10 / sup 4-6 / phi / sub 0 //平方根Hz，与理论预测值非常吻合。

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