response of composite multiferroic ring within multidirectional bias magnetic field
Name: Scott William Newacheck
Grad Year: 2021
Multiferroic composites have been highly studied for magnetoelectric applications with higher efficiency and better miniaturization potential than the electromagnetic paradigm. In the presented study, a Terfenol-D ring was bonded to a radially poled outer piezoelectric ring to form a multiferroic composite. The composite concentric ring structure was characterized under a varying bias magnetic field while electrically loaded near resonance to report on the in-plane converse magnetoelectric (CME) response. The bias magnetic field was varied from 0Oe to above saturation (~2650Oe). The composite ring orientation was rotated about a non-symmetrical axis. Each orientation was observed to have peak with a similar maximum CME value of ~490 mG/V. The bias magnetic field required to reach maximum CME increased as the composite ring is rotated away from optimal orientation. At orientations where the applied bias magnetic field was nearly parallel to the surface of the ring, the aforementioned results were found invalid due the lack of sufficiently high magnetic field to reach maximum CME. In all, the CME response was found to be high dependent on the bias magnetic field applied in the direction of the ring axis while being insensitive to field applied orthogonal to the axis.
Industry Application Area(s)
Energy/Clean technology | Materials