Engineering the Magnetoelectric Response in Piezocrystal-Based Magnetoelectrics: Basic Theory, Choice of Materials, Model Calculations

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abstract

This chapter presents a theoretical basis of the anisotropic magnetoelectric (ME) effect in tri-layers of metglas and piezoelectric (PE) single crystals. The properties of various common PE and magnetostrictive substances are discussed, and arguments for the choice of the most appropriate materials are made. A linear description of the ME effects in terms of electric, magnetic and elastic material fields and material constants is presented. An averaging quasi-static method is used to illustrate the relation between the material constants, their anisotropy and the transversal direct ME voltage and charge coefficients. Subsequently, the aforementioned model is employed in the calculation of the maximum expected direct ME voltage coefficient for a series of tri-layered Metglas/Piezocrystal/Metglas composites as a function of the PE crystal orientation. The ME effects are shown to be strongly dependent on the crystal orientation, which supports the possibility of inducing large ME voltage coefficients in composites comprising lead-free PE single crystals such as LiNbO3, LiTaO3, α-GaPO4, α-quartz, langatate and langasite through the optimization of the crystal orientation.

authors

João V. Vidal, Andrey A. Timopheev, Andrei L. Kholkin, Nikolai A. Sobolev

our authors

foto Andrei Kholkin

Andrei Kholkin

Retired Researcher

Groups

G2 - Photonic, Electronic and Magnetic Materials

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Publication Details

type
Book Chapter
year
2016
Book Title
Nanostructures and Thin Films for Multifunctional Applications: Technology, Properties and Devices
editors
Ion Tiginyanu, Pavel Topala, Veaceslav Ursaki
publisher
Springer International Publishing
isbn
978-3-319-30197-6
book digital object identifier
10.1007/978-3-319-30198-3_6
link
http://link.springer.com/chapter/10.1007%2F978-3-319-30198-3_6

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