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Open AccessArticle

Low-Frequency Noise of Magnetic Sensors Based on the Anomalous Hall Effect in Fe–Pt Alloys

Department of Physics, Brown University, Providence, RI 02912, USA
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Author to whom correspondence should be addressed.
Sensors 2019, 19(16), 3537; https://doi.org/10.3390/s19163537
Received: 22 July 2019 / Revised: 9 August 2019 / Accepted: 11 August 2019 / Published: 13 August 2019
(This article belongs to the Special Issue Magnetic Sensing Technology, Materials and Applications)
We took advantage of the large anomalous Hall effect (AHE) in Fe–Pt ferromagnetic alloys and fabricated magnetic sensors for low-frequency applications. We characterized the low-frequency electronic noise and the field detectability of the FexPt100-x system with various thin film thicknesses and Fe concentrations. The noise source consisted of 1/f and Johnson noise. A large current density increased the 1/f noise but not the Johnson noise. We found that the field detectability of the optimized Fe–Pt thin film offers much better low-frequency performance than a highly sensitive commercial semiconductor Hall sensor. Anomalous Hall effect sensors are, therefore, good candidates for magnetic sensing applications. View Full-Text
Keywords: anomalous Hall effect; noise measurement; Fe–Pt alloy anomalous Hall effect; noise measurement; Fe–Pt alloy
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MDPI and ACS Style

Zhang, Y.; Hao, Q.; Xiao, G. Low-Frequency Noise of Magnetic Sensors Based on the Anomalous Hall Effect in Fe–Pt Alloys. Sensors 2019, 19, 3537. https://doi.org/10.3390/s19163537

AMA Style

Zhang Y, Hao Q, Xiao G. Low-Frequency Noise of Magnetic Sensors Based on the Anomalous Hall Effect in Fe–Pt Alloys. Sensors. 2019; 19(16):3537. https://doi.org/10.3390/s19163537

Chicago/Turabian Style

Zhang, Yiou; Hao, Qiang; Xiao, Gang. 2019. "Low-Frequency Noise of Magnetic Sensors Based on the Anomalous Hall Effect in Fe–Pt Alloys" Sensors 19, no. 16: 3537. https://doi.org/10.3390/s19163537

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