Stolt MJ, Schneider S, Mathur N, Shearer MJ, Rellinghaus B, Nielsch K, Jin S (2019)
Publication Type: Journal article
Publication year: 2019
Book Volume: 29
Article Number: 1805418
Journal Issue: 12
Magnetic skyrmions are topologically protected spin textures that are being investigated for their potential use in next generation magnetic storage devices. Here, magnetic skyrmions and other magnetic phases in Fe 1−x Co x Ge (x < 0.1) microplates (MPLs) newly synthesized via chemical vapor deposition are studied using both magnetic imaging and transport measurements. Lorentz transmission electron microscopy reveals a stabilized magnetic skyrmion phase near room temperature (≈280 K) and a quenched metastable skyrmion lattice via field cooling. Magnetoresistance (MR) measurements in three different configurations reveal a unique anomalous MR signal at temperatures below 200 K and two distinct field dependent magnetic transitions. The topological Hall effect (THE), known as the electronic signature of magnetic skyrmion phase, is detected for the first time in a Fe 1−x Co x Ge nanostructure, with a large and positive peak THE resistivity of ≈32 nΩ cm at 260 K. This large magnitude is attributed to both nanostructuring and decreased carrier concentrations due to Co alloying of the Fe 1−x Co x Ge MPL. A consistent magnetic phase diagram summarized from both the magnetic imaging and transport measurements shows that the magnetic skyrmions are stabilized in Fe 1−x Co x Ge MPLs compared to bulk materials. This study lays the foundation for future skyrmion-based nanodevices in information storage technologies.
APA:
Stolt, M.J., Schneider, S., Mathur, N., Shearer, M.J., Rellinghaus, B., Nielsch, K., & Jin, S. (2019). Electrical Detection and Magnetic Imaging of Stabilized Magnetic Skyrmions in Fe1−xCoxGe (x < 0.1) Microplates. Advanced Functional Materials, 29(12). https://doi.org/10.1002/adfm.201805418
MLA:
Stolt, Matthew J., et al. "Electrical Detection and Magnetic Imaging of Stabilized Magnetic Skyrmions in Fe1−xCoxGe (x < 0.1) Microplates." Advanced Functional Materials 29.12 (2019).
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