Characterizing the Magnetic Interfacial Coupling of the Fe/FeGe Heterostructure by Ferromagnetic Resonance

Xie, Zhongkui; Li, Yan; Gong, Zi-Zhao; Yang, Xu; Li, Yang; Sun, Rui; Li, Na; Sun, Yun-Bing; Zhao, Jianjun; Cheng, Zhao‐Hua; He, Wei

doi:10.1021/acsami.0c11902

Cited by 8 publications

(2 citation statements)

References 31 publications

(43 reference statements)

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“…1(c) and (d). Material wise, an iron layer in region I induces a ferromagnetic coupling with the adjacent FeGe film 55,56 , whereas an EuS film 57 favours an antiferromagnetic one. On the other hand, metallic oxides, such as MgO 58 or Ir/MgO 59 , on the capping layer may further enhance the perpendicular anisotropy via orbital hybridization between oxygen and iron atoms.…”

Section: Model System and Simulation Methodsmentioning

confidence: 99%

Skyrmion battery effect via inhomogeneous magnetic anisotropy

Hao

Zhuo

Manchon

et al. 2021

Applied Physics Reviews

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Magnetic skyrmions are considered as a promising candidate for the next-generation information processing technology. Being topologically robust, magnetic skyrmions are swirling spin textures that can be used in a broad range of applications from memory devices, logic circuits, to neuromorphic computing. In a magnetic medium lacking inversion symmetry, magnetic skyrmion arises as a result of the interplay between magnetic exchange interactions, Dzyaloshinskii-Moriya interaction, and magnetic anisotropy. Instrumental to the integrated skyrmion-based applications are the creation and manipulation of magnetic skyrmions at a designated location, absent any need of a magnetic field. In this paper, we propose a generic design strategy to achieve that and a model system to demonstrate its feasibility. By implementing in a disk-shaped thin film heterostructure an inhomogeneous perpendicular magnetic anisotropy, stable sub-100-nm size skyrmions can be generated without magnetic field. This structure can be etched out via, for example, focused ion beam microscope. Using micromagnetic simulation, we show that such heterostructure not only stabilizes the edge spins of the skyrmion, but also protects its rotation symmetry. Furthermore, we may switch the spin texture between skyrmionic and vortex-like ones by tuning the slope of perpendicular anisotropy using a bias voltage. When embedded into a magnetic conductor and under a spin polarized current, such heterostructure emits skyrmions continuously and may function as a skyrmion source. This unique phenomenon is dubbed as skyrmion battery effect.Our proposal may open a novel venue for the realization of all-electric skyrmion-based device.

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Section: Model System and Simulation Methodsmentioning

confidence: 99%

Skyrmion battery effect via inhomogeneous magnetic anisotropy

Hao

Zhuo

Manchon

et al. 2021

Applied Physics Reviews

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“…where ∆H 0 is the linewidth at zero frequency determined by inhomogeneous broadening, and α is the Gilbert damping of Ni. The increased inhomogeneous broadening may result from interfacial magnetic coupling, which gives rise to the inhomogeneous magnetization texture [144,168]. The enhanced Gilbert damping suggests additional loss of the spin angular momentum, which may be attributed to the spin pumping effect and the exchange coupling between the Fe and Ni atoms.…”

Section: Spin-torque Fmrmentioning

confidence: 99%

Ferromagnetic Resonance in Two-dimensional van der Waals Magnets: A Probe for Spin Dynamics

Tang¹,

Alahmed²,

Mahdi³

et al. 2023

Preprint

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The discovery of atomic monolayer magnetic materials has stimulated intense research activities in the two-dimensional (2D) van der Waals (vdW) materials community. The field is growing rapidly and there has been a large class of 2D vdW magnetic compounds with unique properties, which provides an ideal platform to study magnetism in the atomically thin limit. In parallel, based on tunneling magnetoresistance and magneto-optical effect in 2D vdW magnets and their heterostructures, emerging concepts of spintronic and optoelectronic applications such as spin tunnel field-effect transistors and spin-filtering devices are explored. While the magnetic ground state has been extensively investigated, reliable characterization and control of spin dynamics play a crucial role in designing ultrafast spintronic devices. Ferromagnetic resonance (FMR) allows direct measurements of magnetic excitations, which provides insight into the key parameters of magnetic properties such as exchange interaction, magnetic anisotropy, gyromagnetic ratio, spin-orbit coupling, damping rate, and domain structure. In this review article, we present an overview of the essential progress in probing spin dynamics of 2D vdW magnets using FMR techniques. Given the dynamic nature of this field, we focus mainly on the broadband FMR, optical FMR, and spin-torque FMR, and their applications in studying prototypical 2D vdW magnets including CrX3 (X = Cl, Br, I), Fe5GeTe2, and Cr2Ge2Te6. We conclude with the recent advances in laboratory-and synchrotron-based FMR techniques and their opportunities to broaden the horizon of research pathways into atomically thin magnets.

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Magnetocrystalline anisotropy of epitaxially grown FeRh/MgO(001) films

Zhu

Xie

et al. 2022

Journal of Alloys and Compounds

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Characterizing the Magnetic Interfacial Coupling of the Fe/FeGe Heterostructure by Ferromagnetic Resonance

Cited by 8 publications

References 31 publications

Skyrmion battery effect via inhomogeneous magnetic anisotropy

Skyrmion battery effect via inhomogeneous magnetic anisotropy

Ferromagnetic Resonance in Two-dimensional van der Waals Magnets: A Probe for Spin Dynamics

Magnetocrystalline anisotropy of epitaxially grown FeRh/MgO(001) films

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