Electrochemical and in situ magnetic study of iron/iron oxide films oxidized and reduced in KOH solution for magneto-ionic switching
Electrochemical and in situ magnetic study of iron/iron oxide films oxidized and reduced in KOH solution for magneto-ionic switching
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DOI：
10.1016/j.elecom.2016.09.018
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发表时间：
2016-11-01
影响因子：
5.4
通讯作者：
Leistner, K.
中科院分区：
文献类型：
--
作者：
Duschek, K.;Uhlemann, M.;Leistner, K.
进行电化学和原位磁性研究，以确定通过在KOH水溶液中反复氧化和还原铁物种来实现室温电化学（磁离子）磁性切换的关键参数。动电位程序允许区分的反应电位，并在体铁电极上的测量相反，发现在薄膜几何形状的溶解过程的重要性。溶液的pH值影响溶解和还原成金属铁。磁性强烈地依赖于所施加的氧化和还原电位。当在还原成金属铁的电位和中间氧化电位之间切换时，获得大的磁性变化，揭示了氧化物层结构的影响。(C)2016爱思唯尔B.V.保留所有权利。
An electrochemical and in situ magnetic study is conducted to identify key parameters for room-temperature electrochemical (magneto-ionic) switching of magnetism by repeated oxidation and reduction of iron species in aqueous KOH. Potentiodynamic routines allow to distinguish the reaction potentials and, in contrast to measurements on bulk Fe electrodes, uncover the importance of dissolution processes in thin film geometry. The pH of the solution affects both dissolution and reduction to metallic iron. The magnetic properties strongly depend on the applied oxidation and reduction potentials. Large magnetic changes are obtained when switching between the potential of reduction to metallic iron and intermediate oxidation potentials, revealing an influence of the structure of the oxide layer. (C) 2016 Elsevier B.V. All rights reserved.