Scientific paper ID 1891 : 2019/3

The paper is devoted to the study of the magnetoelectric effect in asymmetric and symmetric magnetoelectric gradient structures based on Metglas / Ni / PZT designed for use in the automotive industry. The asymmetric gradient structures have a higher value of the magnetoelectric coefficient at the bending resonance mode, which is confirmed by the conducted studies. The obtained values of the magnetoelectric coefficient for Metglas / Ni / PZT structure reaches 90 V/(cm·Oe). The magnitude of the bias field in the studied gradient magnetoelectric structures was reduced from 55 Gs to 0 Gs. The studied structures can be applied to the development of automotive crankshaft position sensors, or any other position sensors. Self-biased or gradient material is a two-phase composition of magnetostrictive material with a gradient of magnetization, and ferroelectric material with a gradient of polarization, which connected to each other. Self-biased magnetoelectric sensors have a number of advantages over traditional ones, in particular they have higher sensitivity, smaller dimensions and weight, provide operation without additional energy sources. The magnetoelectric crankshaft position sensor is structurally a magnetoelectric element with an electronic signal processing circuit located in the immediate vicinity of the crankshaft pulley or a disk with magnets attached to it.