期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41467-020-18552-z
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资金
- Projekt DEAL
Owing to electric-field screening, the modification of magnetic properties in ferromagnetic metals by applying small voltages is restricted to a few atomic layers at the surface of metals. Bulk metallic systems usually do not exhibit any magneto-electric effect. Here, we report that the magnetic properties of micron-scale ferromagnetic metals can be modulated substantially through electrochemically-controlled insertion and extraction of hydrogen atoms in metal structure. By applying voltages of only similar to 1V, we show that the coercivity of micrometer-sized SmCo5, as a bulk model material, can be reversibly adjusted by similar to 1T, two orders of magnitudes larger than previously reported. Moreover, voltage-assisted magnetization reversal is demonstrated at room temperature. Our study opens up a way to control the magnetic properties in ferromagnetic metals beyond the electric-field screening length, paving its way towards practical use in magneto-electric actuation and voltage-assisted magnetic storage.
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