Enhanced magnetoelectric efficiency of the Tb1 − xDyxFe2 − y/Pb(Zr,Ti)O3 cylinder multi-electrode composites

Abstract

Cylinder layered magnetoelectric (ME) Tb1−xDyxFe2−y/Pb(Zr,Ti)O3 (T–P), Pb(Zr,Ti)O3/Tb1−xDyxFe2−y/Pb(Zr,Ti)O3 (P–T–P) and Tb1−xDyxFe2−y/Pb(Zr,Ti)O3/Tb1−xDyxFe2−y/Pb(Zr,Ti)O3 (T–P–T–P) composites with the same overall dimensions, but different structures and layers were designed and prepared for enhancing magnetoelectric efficiency. The ME effect in the vertical mode was studied. Compared with the T–P and T–P–T–P composites, the hollow P–T–P composite with a multi-electrode cylinder structure has higher ME effect and uses less Tb1−xDyxFe2−y (Terfenol-D, a piezomagnetic material). The ME efficiency factor of P–T–P is more than two times higher than the other two composites. The reason for the improvement can be ascribed to the effective working surface conditions and the series multi-electrode effect. The results of the study indicate that this type of hollow multi-electrode cylinder ME composite can enhance the efficiency of piezomagnetic materials, particularly Terfenol-D. This finding demonstrates that creating similar structural designs not only reduces the weight, but also provides a cost effective way to manufacture ME devices for practical applications.