Electrochemical and in situ magnetic study of iron/iron oxide films oxidized and reduced in KOH solution for magneto-ionic switching

被引：35
作者：
Duschek, K. [1 ,2 ]
Uhlemann, M. [1 ]
Schloerb, H. [1 ]
Nielsch, K. [1 ,3 ]
Leistner, K. [1 ,3 ]
机构：
[1] IFW Dresden, POB 270116, D-01171 Dresden, Germany
[2] Univ Appl Sci Dresden, Friedrich List Pl 1, D-01069 Dresden, Germany
[3] Tech Univ Dresden, Fac Mech Engn, Inst Mat Sci, D-01062 Dresden, Germany
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2016年 / 72卷
关键词：
Magnetoelectric effect; Magnetic films; Magnetoionic effect; Oxidation; Reduction; Iron; ALKALINE-SOLUTIONS; AQUEOUS-SOLUTION; IRON; FERROMAGNETS; REDUCTION; OXIDATION; ELECTRODE; BEHAVIOR;
D O I：
10.1016/j.elecom.2016.09.018
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
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.
引用
收藏
页码：153 / 156
页数：4
相关论文
共 24 条
  • [1] Observation and modeling of the reduction of hematite particles to metal in alkaline solution by electrolysis
    Allanore, A.
    Lavelaine, H.
    Valentin, G.
    Birat, J. P.
    Delcroix, P.
    Lapicque, F.
    [J]. ELECTROCHIMICA ACTA, 2010, 55 (12) : 4007 - 4013
  • [2] An attempt of experimental separation of the potentiodynamic anodic peaks of iron in alkaline solutions and application of the ohmic model for passive film growth
    Amaral, ST
    Martini, EMA
    Müller, IL
    [J]. CORROSION SCIENCE, 2001, 43 (05) : 853 - 879
  • [3] Bauer U, 2015, NAT MATER, V14, P174, DOI [10.1038/NMAT4134, 10.1038/nmat4134]
  • [4] Cornell RM., 1996, IRON OXIDES, P458
  • [5] Intercalation-Driven Reversible Control of Magnetism in Bulk Ferromagnets
    Dasgupta, Subho
    Das, Bijoy
    Knapp, Michael
    Brand, Richard. A.
    Ehrenberg, Helmut
    Kruk, Robert
    Hahn, Horst
    [J]. ADVANCED MATERIALS, 2014, 26 (27) : 4639 - +
  • [6] Influence of controlled surface oxidation on the magnetic anisotropy of Co ultrathin films
    Di, N.
    Kubal, J.
    Zeng, Z.
    Greeley, J.
    Maroun, F.
    Allongue, P.
    [J]. APPLIED PHYSICS LETTERS, 2015, 106 (12)
  • [7] THE ANODIC-DISSOLUTION PROCESS ON ACTIVE IRON IN ALKALINE-SOLUTIONS
    DRAZIC, DM
    HAO, CS
    [J]. ELECTROCHIMICA ACTA, 1982, 27 (10) : 1409 - 1415
  • [8] Research Update: Magnetoionic control of magnetization and anisotropy in layered oxide/metal heterostructures
    Duschek, K.
    Pohl, D.
    Faehler, S.
    Nielsch, K.
    Leistner, K.
    [J]. APL MATERIALS, 2016, 4 (03):
  • [9] Study of passive films formed on mild steel in alkaline media by the application of anodic potentials
    Freire, L.
    Novoa, X. R.
    Montemor, M. F.
    Carmezim, M. J.
    [J]. MATERIALS CHEMISTRY AND PHYSICS, 2009, 114 (2-3) : 962 - 972
  • [10] GUZMAN RSS, 1979, ELECTROCHIM ACTA, V24, P395
123