Amorphous Ferrimagnets: an Ideal Host for Ultra-Small Skyrmions

Poon, S. J.; Ting, Chung

doi:10.1007/s10948-019-05266-7

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Indeed, very few studies focus on the role of disorder on DMI [21]. Furthermore, ferrimagnetic materials have drawn attention due to their low saturation magnetization, low stray fields, reduced sensitivity to external magnetic fields, and fast spin dynamics, all of which favor ultra-fast and ultra-small skyrmions [22][23][24][25][26]. Very recently, Quessab et al have experimentally studied the interfacial DMI in amorphous Pt/GdCo thin films, and shown a strong tunability of the DMI by varying * mm8by@virginia.edu the thickness of the GdCo alloy and cap layer composition [27].…”

Section: Introductionmentioning

confidence: 99%

Tuning Dzyaloshinskii-Moriya interaction in ferrimagnetic GdCo: A first-principles approach

et al. 2021

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We present a systematic analysis of our ability to tune chiral Dzyaloshinskii-Moriya Interactions (DMI) in compensated ferrimagnetic Pt/GdCo/Pt1−xWx trilayers by cap layer composition. Using first principles calculations, we show that the DMI increases rapidly for only ∼ 10% W and saturates thereafter, in agreement with experiments. The calculated DMI shows a spread in values around the experimental mean, depending on the atomic configuration of the cap layer interface. The saturation is attributed to the vanishing of spin orbit coupling energy at the cap layer and the simultaneous constancy at the bottom interface. Additionally, we predict the DMI in Pt/GdCo/X (X = Ta, W, Ir) and find that W in the cap layer favors a higher DMI than Ta and Ir that can be attributed to the difference in d -band alignment around the Fermi level. Our results open up exciting combinatorial possibilities for controlling the DMI in ferrimagnets towards nucleating and manipulating ultrasmall high-speed skyrmions.

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Section: Introductionmentioning

confidence: 99%

Tuning Dzyaloshinskii-Moriya interaction in ferrimagnetic GdCo: A first-principles approach

et al. 2021

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Ferrimagnets for spintronic devices: From materials to applications

Zhang

Feng

Zheng

et al. 2023

Applied Physics Reviews

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Spintronic devices use spin instead of charge to process information and are widely considered as promising candidates for next-generation electronic devices. In past decades, the main motivation in spintronics has been to discover new mechanisms and novel material systems to improve both device performance and the application prospects of spintronics. Recently, researchers have found that ferrimagnetic materials—in which sublattices are coupled antiferromagnetically—offer an emerging platform for realizing high-density, high-speed, and low-power-consumption memory and logic functions. Within such a ferrimagnetic class, vanishing magnetization and ultrafast magnetic dynamics can be achieved by adjusting chemical composition and temperature, among other parameters. Meanwhile, unlike for antiferromagnets, conventional electrical read–write methods remain suitable for ferrimagnets, which is beneficial for applications. In this review, an abundant class of ferrimagnets including oxides and alloys is surveyed, and unique magnetic dynamics and effective methods for manipulating the magnetic states of ferrimagnets are discussed. Finally, novel storage and computing devices based on ferrimagnets are considered, as there are some challenges to be addressed in future applications of ferrimagnets.

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Amorphous Ferrimagnets: an Ideal Host for Ultra-Small Skyrmions

Cited by 2 publications

References 18 publications

Tuning Dzyaloshinskii-Moriya interaction in ferrimagnetic GdCo: A first-principles approach

Tuning Dzyaloshinskii-Moriya interaction in ferrimagnetic GdCo: A first-principles approach

Ferrimagnets for spintronic devices: From materials to applications

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