High Tc TMR-Superconducting Mixed Sensor: Fabrication and Performance

High Tc TMR-Superconducting Mixed Sensor: Fabrication and Performance
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高温 TMR-超导混合传感器:制造和性能

DOI:
10.1109/tasc.2018.2867790
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发表时间:
2019-01
影响因子:
1.8
通讯作者:
Han Li
Han Li
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wu Yue;Xiao Liye;Hou Shizhong;Gao Zhaoshun;Han Li

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巨磁阻(GMR)-超导混合磁传感器具有灵敏度高、稳定性好、带通特性好、成本低等优点,有望得到广泛应用。如果用更高灵敏度、更低功耗的隧道磁阻(TMR)代替巨磁阻(GMR)制备隧道磁阻-超导混合磁传感器,将进一步提高器件的性能。采用键合工艺制作了TMR-超导混合传感器,并验证了其可行性。灵敏度为18.1%/Oe,是TMR器件的21倍,在77 K时噪声水平为6.6pT/Hz ~(1/2)。同时,在4.5 ~ 77 K温度范围内,比较了不同收缩宽度的超导聚磁器对器件性能的影响。
Giant magneto-resistive (GMR)-superconducting mixed magnetic sensors are expected to be widely used because of their excellent sensitivity, stability, band characteristics, and low cost. If a tunnel magnetoresistance (TMR)-superconducting mixed magnetic sensor is prepared using a higher sensitivity and lower power TMR instead of GMR, the performance of the device will be further improved. We have fabricated a TMR-superconducting mixed sensor by a bonding process, and the feasibility was verified. The sensitivity was 21 times higher than that of the TMR device alone, reaching 18.1%/Oe. The noise level reached 6.6 pT/Hz1/2 at 77 K. At the same time, the influence of different constriction width of the superconducting magnetic flux concentrator on the device performance was compared at 4.5–77 K.
DOI: 10.1103/physrevlett.85.4164
发表时间: 2000-08
影响因子: 8.6
作者:
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