Zheng Ma is now a postdoctoral researcher working in the Gnm3 Research group. His current research focuses on the study of voltage control of magnetism via especially magneto-ionics in transition-metal oxide or nitride thin films, using a liquid or solid electrolyte. He defended his PhD thesis at the Institute of Materials Science of Barcelona (ICMAB-CSIC) in 2021. He has worked closely with a group of experts on multiferroic epsilon iron oxide in the forms of nanoparticles and thin films, exploiting a wide range of experimental techniques (both advanced lab equipment and large-scale facilities).