Shape demagnetization effect on layered magnetoelectric composites

Details Shape demagnetization effect on layered magnetoelectric composites Shape demagnetization effect on layered magnetoelectric composites

2007-08-30

arxiv.org/abs/0708.4071v1

Physics

Condensed Matter

Materials Science

11 pages, 4 figures

Scientific paper

Magnetoelectric (ME) voltage coefficient was always considered independent on in-plane shape of plate layered magnetostrictive-piezoelectric composites due to the oversimplification in ME theoretical models. In this article, we present that in fact the ME voltage coefficient is largely dependent on the in-plane shape owing to shape demagnetization effect on magnetostrictivity. Theoretical analysis and experimental results both indicate that ME voltage coefficient changes notably with the variation of in-plane sizes (length and width) of layered ME properties. ME coefficient increases with the rise of in-plane sizes, and different aspect ratio will also result in different ME coefficient. Proper design of in-plane shape will greatly promote the development of ME devices.

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