Manipulation of magnetic anisotropy through linear piezoelectric response in magnetoelectric heterostructures
Daniel B. Gopman, Robert D. Shull, Yury Y. Iunin, Margo Staruch, Shu-Fan Cheng, Konrad Bussmann, Peter Finkel
The ability to tune both magnetic and electric properties concomitantly in magnetoelectric (ME) composite heterostructures coupled through interfacial strain is crucial for multiple transduction applications including energy harvesting or magnetic field sensing devices. In this work, magnetostrictive Fe50Co50 and Fe50Co50/Ag multilayered films were deposited on (0 1 1)-oriented domain-engineered Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) relaxor ferroelectric single crystals with a higher temperature stability and broader operational voltage range than binary relaxors. In-plane rotation of the magnetic anisotropy is observed for the FeCo/Ag multilayer film with the easy axis laying in the direction of electrically driven tensile strain. Both reversible and irreversible propagation of magnetic domains with applied electric fields is directly observed with a magneto-optic indicator film (MOIF) technique. For this multilayer film, the maximum value of the converse magnetoelectric coupling coefficient (\alpha_CME) is enhanced compared to that for FeCo, primarily due to the enhancement of the piezomagnetic coefficient. A remarkably large value of \alpha_CME = 3.5 x 10-6 s m-1 is revealed for the FeCo/Ag multilayer film and this value is achieved at room temperature and at fields below the electric coercive field (i.e. operating in the linear piezoelectric regime), representing a step towards realistic ME transduction devices.
, Shull, R.
, Iunin, Y.
, Staruch, M.
, Cheng, S.
, Bussmann, K.
and Finkel, P.
Manipulation of magnetic anisotropy through linear piezoelectric response in magnetoelectric heterostructures, Nature - Scientific Reports, [online], https://doi.org/10.1038/srep37429
(Accessed December 6, 2023)