DOI: 10.1063/5.0243392 ISSN: 0021-8979
Charge-mediated electric control of the perpendicular magnetic anisotropy in Fe–Ga/PMN-PT composite multiferroic
M. Tortarolo, D. Goijman, M. A. Barral, S. Di Napoli, A. A. Pérez Martínez, G. Ramírez, A. Sarmiento Chavez, J. Gómez, A. Zakharova, S. E. Bayram, F. Stramaglia, C. A. F. Vaz, J. Milano, C. PiamontezeWe present an experimental study of the magnetoelectric coupling in the Fe-Ga/Pb[(Mg1/3Nb2/3)O3]0.68-[PbTiO3]0.31 thin-film multiferroic composite using x-ray magnetic circular dichroism and ferromagnetic resonance (FMR). Our measurements show evidence for a charge-mediated coupling mechanism, suggested by the asymmetric magnetic remanence (Mrem) behavior under opposite electric fields (±E) and the asymmetric resonance field (Hr) in the FMR measurements. Also, the FMR measurements reveal a perpendicular magnetic anisotropy that can be related to an interface charge effect and it is tunable by the E field. Ab initio calculations support the existence of a charge-mediated coupling at the Fe–Ga/PMN-PT interface.