1. Wireless magneto-ionics: voltage control of magnetism by bipolar electrochemistry
- Author
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Ma, Zheng, Fuentes-Rodriguez, Laura, Tan, Zhengwei, Pellicer, Eva, Abad, Llibertat, Herrero-Martín, Javier, Menéndez, Enric, Casañ-Pastor, Nieves, and Sort, Jordi
- Subjects
Condensed Matter - Materials Science - Abstract
Modulation of magnetic properties through voltage-driven ion motion and redox processes, i.e., magneto-ionics, is a unique approach to control magnetism with electric field for low-power memory and spintronic applications. So far, magneto-ionics has been achieved through direct electrical connections to the actuated material. Here we evidence that an alternative way to reach such control exists in a wireless manner. Induced polarization in the conducting material immersed in the electrolyte, without direct wire contact, promotes wireless bipolar electrochemistry, an alternative pathway to achieve voltage-driven control of magnetism based on the same electrochemical processes involved in direct-contact magneto-ionics. A significant tunability of magnetization is accomplished for cobalt nitride thin films, including transitions between paramagnetic and ferromagnetic states. Such effects can be either volatile or non-volatile depending on the electrochemical cell configuration. These results represent a fundamental breakthrough that may inspire future device designs for applications in bioelectronics, catalysis, neuromorphic computing, or wireless communications., Comment: 32 pages, 4 figures, Supplementary Information (9 figures)
- Published
- 2023