We present an experimental study of the magnetoelectric coupling (MEC) in the Fe-Ga/PMN-PT thin film multiferroic composite by means of x-ray magnetic circular dichroism (XMCD) and ferromagnetic resonance (FMR). Our measurements show evidence for a charge mediated coupling mechanism, suggested by the asymmetric magnetic remanence (Mrem) behaviour under opposite electric fields (± E) and the asymmetric resonance field (Hr) in the FMR measurements. Also, the FMR measurements reveal a perpendicular magnetic anisotropy (PMA), that can be related to an interface charge effect. and it is tunable by E field. Ab initio calculations support the existence of a charge mediated coupling at the Fe-Ga/PMN-PT interface.
@article{arxiv.2404.04383,
title = {Evidence for charge mediated coupling in Fe-Ga/PMN-PT composite multiferroic},
author = {M. Tortarolo and D. Goijman and M. A. Barral and S. Di Napoli and A. A. Pérez Martínez and G. Ramírez and A. Sarmiento and J. Gómez and A. Zakharova and S. E. Bayram and F. Stramaglia and C. A. F. Vaz and J. Milano and C. Piamonteze},
journal= {arXiv preprint arXiv:2404.04383},
year = {2025}
}