Erratum: Magnetoelectric bilayer and multilayer structures of magnetostrictive and piezoelectric oxides [Phys. Rev. B64, 214408 (2001)]

Abstract

The necessary correction concerns Eq. ͑2͒ for the transverse magnetoelectric ͑ME͒ coefficient for a bilayer of magnetostrictive and piezoelectric phases. The exact expression given below takes into account the in-plane piezomagnetic coupling q 12 m measured perpendicular to the static magnetic field:The expression reduces to Eq. ͑2͒ for q 11 m ϭq 12 m . Such a condition, however, is not satisfied in nickel ferrite. Our estimation of q 12 m from data on magnetostriction for the ferrite indicates a small positive value for q 12 m ͑compared to a large negative value for q 11 m ͒. The corrected theoretical values of ␣ E,31 are thus a factor of 2 smaller than the estimates in Figs. 6 and 7. The overall good agreement between data and theory claimed in the work, however, is not affected by the correction to calculated values.

Dynamic magnetoelectric effects in bulk and layered composites of cobalt zinc ferrite and lead zirconate titanate

“…The data show strong ME coupling in layered CZFO-PZT. For comparison, the highest value for α′ E is 30 mV/cm Oe in bilayers of lanthanum manganites-PZT, 200 mV/cm Oe for NFO-PZT and 4680 mV/cm Oe for Terfenol-PZT [5,6,14].…”

“…Series electrical connectivity gives rise to a high resistivity, negligible leakage current and strong piezoelectric and ME coupling. Significant developments in this regard are the recent observation of giant ME effects in bilayers and multilayers of lanthanum manganite-PZT and nickel ferrite-PZT [5][6][7][8].…”

“…The (static) effect, first observed in antiferromagnetic Cr 2 O 3, is weak in single-phase compounds [2]. But a composite of piezomagnetic-piezoelectric phases is also expected to be magnetoelectric since α = δP/δH is a "product-property" that results from magnetostriction induced deformation and piezoelectric charge generation [3][4][5]. We are interested in the dynamic ME effect; for an ac magnetic field δH applied to a biased composite, one measures the induced voltage δV.…”

Structural and magnetoelectric properties of MFe 2 O 4 ?PZT (M?=?Ni,Co) and La x (Ca,Sr) 1-x MnO 3 ?PZT multilayer composites

“…The ac electrical field δE produced in the structure is a "productproperty" and is proportional to the piezomagnetic and piezoelectric coefficients of the constituent phases [8]. The magnetoelectric voltage coefficient α E = δE/δH for such composites is in the range 50-5000 mV/Oe cm, depending on the nature and volume of the magnetic and piezoelectric phases [1][2][3][4]6,7]. These values far exceed the ME coefficient of 20 mV/Oe cm for Cr 2 O 3, the best single phase ME material [9].…”

“…The transverse ME effect is an order of magnitude stronger than the longitudinal effect. Multilayer composites consisting of alternative layers of magnetostrictive and piezoelectric materials are observed to show a strong magnetoelectric (ME) effect and are of interest for studies on ME interactions and for potential use in devices [1][2][3][4][5]. Such structures when placed in an external ac magnetic field δH undergo deformation of the magnetic layer due to magnetostriction, resulting in an electrical polarization of the dielectric layer due to piezoelectric effect [6,7].…”