Theoretical optimization of magnetoelectric multilayer laminates

Greener Solvent-Based Processing of Magnetoelectric Nanocomposites

“…In all composites, the ME voltage increases with increasing magnetic field, until the optimum magnetic field is reached (≈330 mT) as a result of the higher striction at such a magnetic field (Figure b). The following decrease of the ME voltage can be explained by the saturation of the magnetostrictive effect on the magnetostrictive CFO nanoparticles. , …”

“…20 ME composites, with ME coupling coefficients ≈1000 times higher than single-phase MEs, are usually categorized according to the connectivity of the two components into 0−3 nanocomposites and 2−2 laminated composites. 21,22 Laminated composites have been largely explored based on their superior ME coefficient (≈some V cm −1 Oe −1 ), though the stress transfer of the coupling layer between piezoelectric and magnetostrictive layers brings undesired relaxation and electrical loss problems. 23 Nanocomposites despite exhibiting a lower ME coupling coefficient (≈some mV cm −1 Oe −1 ) do not exhibit the abovementioned performance limitations, once the magnetostrictive nanoparticles are equally dispersed in the piezoelectric matrix.…”

“…ME composites, with ME coupling coefficients ≈1000 times higher than single-phase MEs, are usually categorized according to the connectivity of the two components into 0–3 nanocomposites and 2–2 laminated composites. , Laminated composites have been largely explored based on their superior ME coefficient (≈some V cm –1 Oe –1 ), though the stress transfer of the coupling layer between piezoelectric and magnetostrictive layers brings undesired relaxation and electrical loss problems …”

“…The following decrease of the ME voltage can be explained by the saturation of the magnetostrictive effect on the magnetostrictive CFO nanoparticles. 21,22 After the calculation of the ME coefficient (α), it is observed that α increases with increasing CFO content on the P@ DMSO/CFO composites (Figure 9c) and with increasing solvent dipole moment on the samples with 20 wt % CFO (Figure 9d). By increasing the CFO content from 10 to 40 wt %, the α value also increases, almost linearly, from 8.8 to 36.4 mV cm −1 Oe −1 , because of the increase in the magnetostriction due to the increase of the magnetostrictive phase on the ME composite.…”