Zehner J, Soldatov I, Schneider S, Heller R, Khojasteh NB, Schiemenz S, Faehler S, Nielsch K, Schaefer R, Leistner K (2020)
Publication Type: Journal article
Publication year: 2020
Book Volume: 6
Article Number: 2000406
Journal Issue: 11
High energy efficiency of magnetic devices is crucial for applications such as data storage, computation, and actuation. Redox-based (magneto-ionic) voltage control of magnetism is a promising room-temperature pathway to improve energy efficiency. However, for ferromagnetic metals, the magneto-ionic effects studied so far require ultrathin films with tunable perpendicular magnetic anisotropy or nanoporous structures for appreciable effects. This paper reports a fully reversible, low voltage-induced collapse of coercivity and remanence by redox reactions in iron oxide/iron films with uniaxial in-plane anisotropy. In the initial iron oxide/iron films, Néel wall interactions stabilize a blocked state with high coercivity. During the voltage-triggered reduction of the iron oxide layer, in situ Kerr microscopy reveals inverse changes of coercivity and anisotropy, and a coarsening of the magnetic microstructure. These results confirm a magneto-ionic deblocking mechanism, which relies on changes of the Néel wall interactions, and of the microstructural domain-wall-pinning sites. With this approach, voltage-controlled 180° magnetization switching with high energy-efficiency is achieved. It opens up possibilities for developing magnetic devices programmable by ultralow power and for the reversible tuning of defect-controlled materials in general.
APA:
Zehner, J., Soldatov, I., Schneider, S., Heller, R., Khojasteh, N.B., Schiemenz, S.,... Leistner, K. (2020). Voltage-Controlled Deblocking of Magnetization Reversal in Thin Films by Tunable Domain Wall Interactions and Pinning Sites. Advanced Electronic Materials, 6(11). https://doi.org/10.1002/aelm.202000406
MLA:
Zehner, Jonas, et al. "Voltage-Controlled Deblocking of Magnetization Reversal in Thin Films by Tunable Domain Wall Interactions and Pinning Sites." Advanced Electronic Materials 6.11 (2020).
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