A comparative study of the domain wall motion in ferrimagnets (Fe,Co)1−x(Gd,Tb)x

Zhou, Yuqing; Xu, Teng; Xue, Lunsheng; Le, Zhao; Zhou, Huaichun; Wang, Zidong; Jiang, Wanjun; Zhou, Yan

doi:10.1039/d2nr02594a

Nanoscale

2022

DOI: 10.1039/d2nr02594a

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A comparative study of the domain wall motion in ferrimagnets (Fe,Co)_1−x(Gd,Tb)_x

Yuqing Zhou

Teng Xu

Lunsheng Xue

et al.

Abstract: Our work reveals the distinctive DW dynamic behaviors in different RE-TM ferrimagnetic materials. The results show that Gd-based ferromagnets are more suitable for achieving ultrafast DW motion and developing spintronic memories and logic devices.

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2024

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Cited by 3 publications

References 58 publications

(79 reference statements)

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Topological Spin Textures: Basic Physics and Devices

Zhou,

Li,

Liang

et al. 2024

Advanced Materials

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In the face of escalating modern data storage demands and the constraints of Moore's Law, exploring spintronic solutions, particularly the devices based on magnetic skyrmions, has emerged as a promising frontier in scientific research. Since the first experimental observation of skyrmions, topological spin textures have been extensively studied for their great potential as efficient information carriers in spintronic devices. However, significant challenges have emerged alongside this progress. This review aims to synthesize recent advances in skyrmion research while addressing the major issues encountered in the field. Additionally, current research on promising topological spin structures in addition to skyrmions is summarized. Beyond 2D structures, exploration also extends to 1D magnetic solitons and 3D spin textures. In addition, a diverse array of emerging magnetic materials is introduced, including antiferromagnets and 2D van der Waals magnets, broadening the scope of potential materials hosting topological spin textures. Through a systematic examination of magnetic principles, topological categorization, and the dynamics of spin textures, a comprehensive overview of experimental and theoretical advances in the research of topological magnetism is provided. Finally, both conventional and unconventional applications are summarized based on spin textures proposed thus far. This review provides an outlook on future development in applied spintronics.

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Topological Spin Textures: Basic Physics and Devices

Zhou,

Li,

Liang

et al. 2024

Advanced Materials

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Universal quantum computing based on magnetic domain-wall qubits

Li,

Zhang,

Ezawa

et al. 2024

Materials Today Quantum

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Driving skyrmions in flow regime in synthetic ferrimagnets

Mallick,

Sassi,

Prestes

et al. 2024

Nat Commun

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The last decade has seen significant improvements in our understanding of skyrmions current induced dynamics, along with their room temperature stabilization, however, the impact of local material inhomogeneities still remains an issue that impedes reaching the regime of steady state motion of these spin textures. Here, we study the spin-torque driven motion of skyrmions in synthetic ferrimagnetic multilayers with the aim of achieving high mobility and reduced skyrmion Hall effect. We consider Pt|Co|Tb multilayers of various thicknesses with antiferromagnetic coupling between the Co and Tb magnetization. The increase of Tb thickness in the multilayers reduces the total magnetic moment and increases the spin-orbit torques allowing to reach velocities up to 400 ms −1 for skyrmions with diameters of about 160 nm. We demonstrate that due to reduced skyrmion Hall effect combined with the edge repulsion of the magnetic track, the skyrmions move along the track without any transverse deflection. Further, by comparing the field-induced domain wall motion and current-induced skyrmion motion, we demonstrate that the skyrmions at the largest current densities present all the characteristics of a dynamical flow regime.

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A comparative study of the domain wall motion in ferrimagnets (Fe,Co)_1−x(Gd,Tb)_x

Abstract: Our work reveals the distinctive DW dynamic behaviors in different RE-TM ferrimagnetic materials. The results show that Gd-based ferromagnets are more suitable for achieving ultrafast DW motion and developing spintronic memories and logic devices.

Cited by 3 publications

References 58 publications

Topological Spin Textures: Basic Physics and Devices

Topological Spin Textures: Basic Physics and Devices

Universal quantum computing based on magnetic domain-wall qubits

Driving skyrmions in flow regime in synthetic ferrimagnets

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