论文标题
基于氢氧化的磁极离子学：可逆的顺磁到铁磁性开关的电场控制$α$ -CO（哦）$ _ {2} $ films
Hydroxide-based magneto-ionics: electric-field control of reversible paramagnetic-to-ferromagnetic switch in $α$-Co(OH)$_{2}$ films
论文作者
论文摘要
Magneto-Iromics已成为操纵磁性特性的一种有前途的方法，这不仅是通过大大降低与电流设备相关的功耗，而且还通过启用了新型功能。迄今为止，基于氧气的系统中主要探索了磁性原始物质，而对替代离子系统的兴趣激增。在这里，我们展示了电沉积$α$ -CO（OH）$ _ {2} $胶片中高效的基于氢氧化物的磁极。 $α$ -CO（OH）$ _ {2} $是室温paramagnet，在电解质门控后用负电压切换为铁电磁后。该系统在施用正电压时完全可逆。可逆的顺磁性到铁磁性转变的起源归因于羟基的离子扩散，从而促进了金属钴铁磁体的形成。我们的发现表明，报道的碳酸盐门控实验报告的最低转接电压之一。通过调整电压幅度和样品区域，我们证明了诱导的离子效应的速度可以大大增强。
Magneto-ionics has emerged as a promising approach to manipulate magnetic properties, not only by drastically reducing power consumption associated with electric current based devices but also by enabling novel functionalities. To date, magneto-ionics have been mostly explored in oxygen-based systems, while there is a surge of interests in alternative ionic systems. Here we demonstrate highly effective hydroxide-based magneto-ionics in electrodeposited $α$-Co(OH)$_{2}$ films. The $α$-Co(OH)$_{2}$, which is a room temperature paramagnet, is switched to ferromagnetic after electrolyte gating with a negative voltage. The system is fully, magnetically reversible upon positive voltage application. The origin of the reversible paramagnetic-to-ferromagnetic transition is attributed to the ionic diffusion of hydroxyl groups, promoting the formation of metallic cobalt ferromagnetic regions. Our findings demonstrate one of the lowest turn-on voltages reported for propylene carbonate gated experiments. By tuning the voltage magnitude and sample area we demonstrate that the speed of the induced ionic effect can be drastically enhanced.
