Enhanced performance of magnetoelectric laminated composites by geometry engineering for high frequency applications

•Novel geometrically modified magneto-electric laminates are presented.•An increased working frequency keeping a high magneto-electric response is observed.•Triangular and rhombic shaped magneto-electric laminates show enhanced performance.•These results open the door towards their implementation in high frequency devices. [Display omitted] This work presents novel geometrically modified magnetoelectric (ME) laminates based on the Fe64Co17Si6.6B12.4 metallic glass and the polyvinylidene fluoride (PVDF) piezoelectric polymer. Laminates with rectangular, triangular and rhombic shapes with an area of 25 mm2 have been fabricated. The induced ME responses of the laminates under an applied DC magnetic field and as a function of the frequency have been analyzed. The results evidence that at the electromechanical resonance frequency, the triangular and rhombic shaped laminates show an improved induced ME response (102 mV and 103 mV, respectively) in comparison with the common rectangular shaped one (98 mV). Furthermore, the working frequencies of the triangular and rhombic laminates significantly increase up to 83 kHz and 102 kHz, respectively, with respect to the rectangular one (67 kHz). Going a step forward, the novel geometries have been compared with that of rectangular magnetoelectric laminates of equivalent EMR frequencies (19 mm and 17 mm long laminates for 83 kHz and 102 kHz, respectively). These rectangular laminates show a drastic drop of their induced ME responses (29 mV and 6.7 mV, respectively), due to the quality factor impair caused by the demagnetizing effects in these shorter samples. This study represents a critical advance in the performance of magnetoelectric laminated composites through geometry modification, opening the door to their implementation in enhanced high frequency devices.