Reversible Control of the Magnetization of Fe₃O₄ via Lithium IonsApplied Physics Letters
- Lithium cells,
- Iron oxides,
- Electric fields,
AbstractIn this report, a reversible control of Fe₃O₄ saturated magnetization by Li ions is demonstrated. A miniature Li ion battery (LIB) was assembled using a Fe₃O₄ nanoparticle layer as the active cathode. A stable magnetism modulation is realized by a nondestructive electrochemical process in which the lithium insertion results in a valence change and partial redistribution of Fe cations in the crystal structure. The relation between the discharge voltage and the chemical phases were studied by ex situ X-ray diffraction and magnetic measurement. In a suitable discharge potential range, a reversible control of Fe₃O₄ saturated magnetization was obtained without structural damage to the magnetic electrode. The experimental results indicate by further optimizing the LIB's performance, a large reversible change in magnetization could be realized at room temperature, suggesting the potential for future practical applications.
Citation InformationGuodong, W., Lin, W., Dong, W., Yanxue, C., Yufeng, T., Shishen, Y., & ... Jun, J. (2017). Reversible control of magnetization of Fe₃O₄ by a solid-state film lithium battery. Applied Physics Letters, 110(6), 1-4