scholarly journals Measurement and study of low-frequency noise in TMR magnetic field sensor

2016 ◽  
Vol 65 (5) ◽  
pp. 057501
Author(s):  
Cao Jiang-Wei ◽  
Wang Rui ◽  
Wang Ying ◽  
Bai Jian-Min ◽  
Wei Fu-Lin
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Magnetic Field Sensor ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Field Sensor

scholarly journals Low-Frequency Noise Evaluation on a Commercial Magnetoimpedance Sensor at Submillihertz Frequencies for Space Magnetic Field Detection

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 4888
Author(s):  
Tao Wang ◽  
Chen Kang ◽  
Guozhi Chai
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Temperature Stability ◽  
Space Missions ◽  
Low Noise ◽  
Integration Time ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Field Detection ◽  
Measurement Limit

The purpose of this study was to measure the low-frequency noise and basic performance of a commercial magnetoimpedance (MI) sensor at sub-millihertz frequencies for use in space missions. Normally, space missions require measuring very weak magnetic fields with a long integration time, such as the space gravitational wave detection mission requiring sub-millihertz frequencies. We set up a platform for measuring the performance on this MI sensor, including low-frequency noise, measurement limit, linearity, and temperature stability. The results show that the low-frequency noise of the MI sensor is below 10 nT/√Hz at 1 mHz and below 100 nT/√Hz at 0.1 mHz; its measurement limit is 600 pT. The MI sensor is characterized by high precision, small size, and low noise, demonstrating considerable potential for application in magnetically sensitive experiments requiring long integration time. This is an effect way to solve the problem that there is on one suitable magnetic sensor at space magnetic field detection, but the sensor requires improvements in temperature stability.

Flux dam, a method to reduce extra low frequency noise when a superconducting magnetometer is exposed to a magnetic field

1995 ◽  
Vol 67 (5) ◽  
pp. 709-711 ◽  
Author(s):  
R. H. Koch ◽  
J. Z. Sun ◽  
V. Foglietti ◽  
W. J. Gallagher
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise

Low-Frequency Noise Characterization of CoFeB/MgO/CoFeB MTJ-Based Perpendicular Field Sensor

2016 ◽  
Vol 52 (7) ◽  
pp. 1-4 ◽  
Author(s):  
Bipul Das ◽  
Y. C. Lee ◽  
L. C. Li ◽  
Liu Yi-Shiou ◽  
Y. W. Suen ◽  
...  
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Field Sensor ◽  
Perpendicular Field ◽  
Noise Characterization

scholarly journals Worldwide extremely low frequency magnetic field sensor network for sprite studies

Radio Science ◽  
2011 ◽  
Vol 46 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Toby Whitley ◽  
Martin Füllekrug ◽  
Michael Rycroft ◽  
Alec Bennett ◽  
Frank Wyatt ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Sensor Network ◽  
Low Frequency ◽  
Magnetic Field Sensor ◽  
Extremely Low Frequency ◽  
Frequency Magnetic Field ◽  
Field Sensor

Improvement of the detectivity in an Fe-Sn magnetic-field sensor with a large current injection

2021 ◽  
Author(s):  
Junichi SHIOGAI ◽  
Zhenhu Jin ◽  
Yosuke Satake ◽  
Kohei Fujiwara ◽  
Atsushi TSUKAZAKI
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Material Design ◽  
Anomalous Hall Effect ◽  
Magnetic Field Sensor ◽  
Device Structure ◽  
Sensor Material ◽  
Large Current ◽  
Noise Measurements ◽  
Field Sensor

Abstract A ferromagnetic nanocrystalline Fe-Sn is an excellent platform for magnetic-field sensor based on anomalous Hall effect (AHE) owing to simple fabrication and superior thermal stability. For improvement of the magnetic-field sensitivity, doping impurity and increasing injection current are effective approaches. However, in the light of magnetic-field detectivity, the large current may increase the voltage noise. In this study, a maximum allowable current of was improved by employing the overlayer electrode configuration on a Ta-doped Fe-Sn AHE sensor. In noise measurements, the 1/f noise becomes significant with increasing the current at low frequency, resulting in saturation of the detectivity to 240 nTHz-1/2 at 120 Hz. At high frequency, the detectivity reaches 48 nTHz-1/2 at 3.1 mA showing ten times improvement of the detectivity compared with the non-doped Fe-Sn AHE sensor. Material design and device structure optimization will accelerate further improvement of the sensing properties of the Fe-Sn-based AHE sensor.

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