In-Plane Sizes Effects on Magnetoelectric Characteristics of a Ni-PZT Planar Heterostructure

Nowadays, the size reduction of electronic devices based on magnetoelectric (ME) effects is an important task. This will provide an opportunity for the wide integration of ME devices into modern microsystem technology. In this letter, the effects of in-plane sizes of planar heterostructures containi...

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Bibliographic Details
Published in:IEEE sensors letters 2020-09, Vol.4 (9), p.1-4
Main Authors: Fedulov, Fedor A., Chashin, Dmitry V., Fetisov, Leonid Y., Kharlamova, Anna M., Fetisov, Yuri K.
Format: Article
Language:English
Subjects:
Acoustic resonance
acoustic resonator
Acoustics
Demagnetization
Electronic devices
Ferromagnetic materials
Frequency measurement
Heterostructures
Lead zirconate titanates
Magnetic field measurement
magnetic field sensors
Magnetic fields
Magnetic sensors
magnetoelectric (ME) effect
Magnetostriction
Nickel
piezoelectric effect
Piezoelectricity
Resonant frequency
Size reduction
Substrates
Voltage drop
Voltage measurement
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Summary:Nowadays, the size reduction of electronic devices based on magnetoelectric (ME) effects is an important task. This will provide an opportunity for the wide integration of ME devices into modern microsystem technology. In this letter, the effects of in-plane sizes of planar heterostructures containing a ferromagnetic Ni film and a piezoelectric lead zirconate titanate (PZT) substrate on characteristics of the direct resonance ME effect are investigated. The Ni films of 10 μ m in thickness were electrodeposited on the PZT substrates that were 200- μ m-thick and 1.2-23 mm in length. The structures were placed in a permanent magnetic field and excited with an ac magnetic field. The generated ME voltage was measured at frequencies near planar acoustic resonances of the structures. For a 1.2 mm long structure, a frequency of 1380 kHz for in-plane acoustic resonance was achieved. A drop in the amplitude of the ME voltage was observed when the length of the structure became less than a critical value. Various mechanisms are discussed that lead to a voltage drop with a reduction of sizes of the structure, including the demagnetization effect, relaxation losses due to frequency dependence of the capacitance and resistance of the PZT layer, and an increase in acoustic losses.
ISSN:2475-1472
2475-1472
DOI:10.1109/LSENS.2020.3021757