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首页> 外文期刊>Bulletin of the American Physical Society >APS -Annual Meeting of the APS Four Corners Section- Event - High-Bandwidth Scanning Hall Probe Microscopy of Superconducting Flux Vortices
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APS -Annual Meeting of the APS Four Corners Section- Event - High-Bandwidth Scanning Hall Probe Microscopy of Superconducting Flux Vortices

机译：APS-anual会议APS四个角落部分 - 事件 - 高带宽扫描霍尔探针超导磁通液体探针显微镜

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摘要

Type-II superconductors experience a mixed state in which lines of quantized magnetic flux penetrate the bulk of the superconducting material. These extit{vortices} interact with one another, electrical currents, and local material parameters. Traditional low-bandwidth ($sim$100$,$Hz) scanning Hall probe microscopy (SHPM) has often been employed to image the static configurations caused by these interactions. However, the limited bandwidth and slow scan times of traditional SHPM do not allow dynamical states of moving vortices to be imaged; such studies require signal bandwidths in the MHz range. By developing specialized Hall sensors and a cryogenic JFET preamplifier, we have extended the operating bandwidth of our SHPM to $sim$10$,$MHz.
机译：II型超导体经历混合状态，其中量化磁通量穿透量的超导材料。这些EXTIT {涡旋}相互作用，电流和本地材料参数相互作用。传统的低带宽（$ SIM $ 100 $，$ Hz）扫描霍尔探针显微镜（SHPM）通常用于图像由这些交互引起的静态配置。但是，传统SHPM的有限带宽和慢速扫描时间不允许待成像移动涡旋的动态状态;这些研究需要MHz范围内的信号带宽。通过开发专门的霍尔传感器和低温JFET前置放大器，我们将SPPM的操作带宽扩展到$ 10 $ 10 $，$ MHz。

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