Study on Magneto-Resistance Sensors for Low Magnetic Field Measurements
Study on Magneto-Resistance Sensors for Low Magnetic Field Measurements
复制标题
低磁场测量磁阻传感器的研究
DOI：
10.1109/tasc.2020.2976994
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发表时间：
2020
影响因子：
1.8
通讯作者：
植木 竜一
中科院分区：
文献类型：
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作者：
He Dongfeng;Umemori Kensei;Ueki Ryuichi;Dohmae Takeshi;Okada Takafumi;Tachiki Minoru;Ooi Shuuichi;Watanabe Makoto;李崗;植木 竜一
超导射频腔的高q工作可以减少表面的功率损耗，并且是连续波工作所需要的。为了实现高q操作，需要减小表面电阻，即Barden-Cooper-Schrieffer电阻和残余电阻之和。残余电阻主要是由于冷却过程中腔体缺陷中的磁通捕获引起的。一种叫做“磁通门传感器”的磁力计被用来测量周围的磁场；然而，与腔体相比，它更大，而且非常昂贵。基于磁阻效应的传感器，如各向异性磁阻（AMR）传感器，比磁通门传感器更小，更便宜。研究了磁阻传感器在室温和液氮温度下的特性。本文报道了研究结果。
High-Q operation of a superconducting radio frequency cavity can reduce the power loss at the surface and is desirable for continuous-wave operation. To realize the high-Q operation, the surface resistance, which is a sum of the Barden-Cooper-Schrieffer resistance and residual resistance, needs to be reduced. The residual resistance has been found to originate primarily from the magnetic flux trapping in defects in the cavity during the cooling down process. A magnetometer called the “flux gate sensor” has been used to measure the ambient magnetic field; however, this is larger in comparison with the cavity and it is very expensive. Sensors based on the magneto-resistance effect, such as the Anisotropic-Magneto-Resistance (AMR) sensor, are smaller and much less expensive than a flux gate sensor. We examined the characteristics of the magneto-resistance sensors at room temperature and liquid nitrogen temperature. The results are reported in this paper.