Research Update: Magnetoionic control of magnetization and anisotropy in layered oxide/metal heterostructures

Duschek K, Pohl D, Faehler S, Nielsch K, Leistner K (2016)

Publication Type: Journal article

Publication year: 2016

Journal

APL Materials American Institute of Physics

Book Volume: 4

Article Number: 032301

Journal Issue: 3

DOI: 10.1063/1.4942636

Abstract

Electric field control of magnetization and anisotropy in layered structures with perpendicular magnetic anisotropy is expected to increase the versatility of spintronic devices. As a model system for reversible voltage induced changes of magnetism by magnetoionic effects, we present several oxide/metal heterostructures polarized in an electrolyte. Room temperature magnetization of Fe-O/Fe layers can be changed by 64% when applying only a few volts in 1M KOH. In a next step, the bottom interface of the in-plane magnetized Fe layer is functionalized by an L10 FePt(001) underlayer exhibiting perpendicular magnetic anisotropy. During subsequent electrocrystallization and electrooxidation, well defined epitaxial Fe3O4/Fe/FePt heterostructures evolve. The application of different voltages leads to a thickness change of the Fe layer sandwiched between Fe-O and FePt. At the point of transition between rigid magnet and exchange spring magnet regime for the Fe/FePt bilayer, this induces a large variation of magnetic anisotropy.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE)

How to cite

APA:

Duschek, K., Pohl, D., Faehler, S., Nielsch, K., & Leistner, K. (2016). Research Update: Magnetoionic control of magnetization and anisotropy in layered oxide/metal heterostructures. APL Materials, 4(3). https://dx.doi.org/10.1063/1.4942636

MLA:

Duschek, K., et al. "Research Update: Magnetoionic control of magnetization and anisotropy in layered oxide/metal heterostructures." APL Materials 4.3 (2016).

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