Piezomagnetic losses in bilayered magnetostrictive/piezoelectric composites: Effect of Terfenol-D content on the magnetoelectric susceptibility

• Published in: Materials letters Vol. 63; no. 29; pp. 2584 - 2586
• Main Authors: Guiffard, B., Guyomar, D., Belouadah, R., Zhang, J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2009
• Subjects: Composites; Magnetoelectric effect; Phase shift; Piezomagnetic losses; Magnetoelectric effect; Piezomagnetic losses; Composites; Phase shift
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2009.09.013

This letter reports on the influence of piezomagnetic loss in magnetostrictive Terfenol-D (TeD)/polyurethane composite layer/piezoelectric PZT ceramic layer laminates on the phase shift between magnetoelectric current and ac magnetic field versus bias dc field. For a given low measurement frequency (1 kHz), piezomagnetic losses are predominant when the amount of TeD powder embedded in polyurethane is small (2 vol.%), inducing an imaginary magnetoelectric susceptibility and a 0° up to 180° variation of phase shift of magnetoelectric current. When TeD content is high enough (7 vol.%), piezomagnetic losses are almost null, which yields a real magnetoelectric susceptibility and a − 90° up to + 90° variation of phase angle of the current.