Frequency tunable resonant magnetoelectric sensors for the detection of weak magnetic field

Autor: Su, J., Niekiel, F., Fichtner, S., Kirchhof, C., Meyners, D., Quandt, E., Wagner, B., Lofink, F.
Přispěvatelé: Publica
Jazyk: angličtina
Rok vydání: 2020
Popis: This paper reports on frequency tunable MEMS magnetoelectric (ME) sensors. Different designs are studied in respect to ME voltage coefficient and frequency tunability. Compared to state-of-the-art ME sensors, the presented ME resonators display a highly reversible and linear frequency tuning, enabled by applying a DC voltage to piezoelectric actuators. A frequency shift of up to 0.2 Hz V-1 is demonstrated for a sensor with a limit of detection of 128 pT/Hz0.5 at resonance frequency of 13 kHz. This sensor type is of particular interest for vector field sensors and sensor arrays in bio-magnetic applications, where sensors with either identical resonance frequencies or precisely defined frequency spacing are required.
Databáze: OpenAIRE