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 FePt system with various thin film thicknesses and Fe concentrations. The noise source consisted of 1/ and Johnson noise. A large current density increased the 1/ 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6719211 | PMC |
| http://dx.doi.org/10.3390/s19163537 | DOI Listing |
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