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Multilayer MgB_2 superconducting quantum interference filter magnetometers

机译：多层MgB_2超导量子干涉滤波器磁强计

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摘要

We report two types of all-MgB_2 superconductive quantum interference filter (SQIF) magnetometers that can measure absolute magnetic fields with high sensitivity. In one configuration, the SQIFs were made of 20 multilayer nonplanar all-MgB_2 superconducting quantum interference devices (SQUIDs) connected in parallel with loop areas ranging in size from 0.4 to 3.6 μm～2. These devices are sensitive to magnetic fields parallel to the substrate and show a single antipeak from 3 to 16 K with a maximum transfer function of ～16 V/T at 3 K and a field noise of ～110 pT/Hz~(1/2) above 100 Hz at 10 K. In a second configuration, the SQIFs were made with 16 planar SQUIDs connected in parallel with loop areas ranging in size from 4μm~2 to 25 μm~2 and are sensitive to the magnetic fields perpendicular to the substrate. The planar SQIF shows a single antipeak from 10 to 22 K with a maximum transfer function of 7800 V/T at 10 K and a field noise of ～70 pT/Hz~(1/2) above 100 Hz at 20 K.
机译：我们报告了两种类型的全MgB_2超导量子干涉滤波器（SQIF）磁力计，它们可以以高灵敏度测量绝对磁场。在一种配置中，SQIF由20个多层非平面全MgB_2超导量子干涉器件（SQUID）制成，并与0.4至3.6μm〜2的环形区域并联连接。这些器件对平行于基板的磁场敏感，在3 K时显示单个反峰，在3 K时最大传递函数为〜16 V / T，场噪声为〜110 pT / Hz〜（1/2 ）在10 K时高于100 Hz。在第二种配置中，SQIF由16个平面SQUID制成，这些SQUID与环路面积并联，范围从4μm〜2到25μm〜2，并且对垂直于基板的磁场敏感。平面SQIF在10 K时显示一个从10到22 K的反峰，最大传递函数为7800 V / T，在20 K时在100 Hz以上时的场噪声为〜70 pT / Hz〜（1/2）。

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  • 来源
    《Applied Physics Letters》 |2016年第17期|172602.1-172602.5|共5页
  • 作者

    Elias Galan; Thomas Melbourne; Bruce A. Davidson; X. X. Xi; Ke Chen;

  • 作者单位

    Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA;

    Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA;

    Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA;

    Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA;

    Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA,Temple Materials Institute, Temple University, Philadelphia, Pennsylvania 19122, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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