Sensors, Vol. 19, Pages 3537: Low-Frequency Noise of Magnetic Sensors Based on the Anomalous Hall Effect in Fe –Pt Alloys

Sensors, Vol. 19, Pages 3537: Low-Frequency Noise of Magnetic Sensors Based on the Anomalous Hall Effect in Fe–Pt Alloys
Sensors doi: 10.3390/s19163537
Authors:
Yiou Zhang
Qiang Hao
Gang Xiao

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.

Source: Sensors - August 12, 2019 Category: Biotechnology Authors: Yiou Zhang Qiang Hao Gang Xiao Tags: Article Source Type: research