Series arrays of planar long Josephson junctions for high dynamic range magnetic flux detection
Series arrays of planar long Josephson junctions for high dynamic range magnetic flux detection
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DOI：
10.1063/1.5126035
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发表时间：
2019-10-01
期刊：
影响因子：
1.6
通讯作者：
Cybart, Shane A.
中科院分区：
文献类型：
--
作者：
LeFebvre, Jay C.;Cho, Ethan;Cybart, Shane A.
我们研究了密集排列的平面长约瑟夫森结串联阵列，用于地磁场中的磁场转换，具有线性响应和高动态范围。该器件是由高温超导体YBa2Cu3O7-Delta(YBCO)薄膜制成的，利用聚焦氦离子束辐照形成约瑟夫森势垒。制作了四个串联阵列，每个阵列由数百个长结组成，并进行了电学测试。根据电流-电压特性的拟合，我们估计临界电流的标准偏差在25%左右。在71K下，电压-磁场测量的传递函数为42 mV/mT，线性响应范围为303µT，动态范围为124分贝。(C)2019年作者(S)。除另有说明外，所有文章内容均受知识共享署名(CC BY)许可证(http://creativecommons.org/licenses/by/4.0/).的许可
We investigated series arrays of closely spaced, planar long Josephson junctions for magnetic field transduction in Earth's field, with a linear response and high dynamic range. The devices were fabricated from thin film high-temperature superconductor YBa2Cu3O7-delta (YBCO) thin films, using focused helium ion beam irradiation to create the Josephson barriers. Four series arrays, each consisting of several hundreds of long junctions, were fabricated and electrically tested. From fits of the current-voltage characteristics, we estimate the standard deviation in critical current to be around 25%. Voltage-magnetic field measurements exhibit a transfer function of 42 mV/mT and a linear response over a range of 303 mu T at 71 K, resulting in a dynamic range of 124 dB. (c) 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).