Current-induced domain wall motion in compensated ferrimagnet

Abstract

Due to the difficulty in detecting and manipulating magnetic states of antiferromagnetic materials, studying their switching dynamics using electrical methods remains a challenging task. In this work, by employing heavy metal/rare earth-transition metal alloy bilayers, we experimentally studied current-induced domain wall dynamics in an antiferromagnetically coupled system. We show that the current-induced domain wall mobility reaches a maximum close to the angular momentum compensation. With experiment and modelling, we further reveal the internal structures of domain walls and the underlying mechanisms for their fast motion. We show that the chirality of the ferrimagnetic domain walls remains the same across the compensation points, suggesting that spin orientations of specific sublattices rather than net magnetization determine Dzyaloshinskii-Moriya interaction in heavy metal/ferrimagnet bilayers. The high current-induced domain wall mobility and the robust domain wall chirality in compensated ferrimagnetic material opens new opportunities for high-speed spintronic devices.

arXiv comment13 pages, 3 figures

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• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Current-driven dynamics of chiral ferromagnetic domain walls
• Electrical switching of an antiferromagnet
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• Fast domain wall motion induced by antiferromagnetic spin dynamics at the angular momentum compensation temperature of ferrimagnets
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• Spin-Orbit Torques in ferrimagnetic GdFeCo Alloys

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• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Current-driven dynamics and ratchet effect of skyrmion bubbles in a ferrimagnetic insulator
• Spin-transfer torques for domain walls in antiferromagnetically coupled ferrimagnets
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• Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: competition of angular momentum transfer and entropic torque
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• Laser-induced ultrafast demagnetization and perpendicular magnetic anisotropy reduction in a Co${}_{88}$Tb${}_{12}$ thin film with stripe domains
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• Electrical generation and detection of terahertz signal based on spin-wave emission from ferrimagnets
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• Effect of inhomogeneous Dzyaloshinskii-Moriya interaction on antiferromagnetic spin-wave propagation
• The domain-wall motion driven by a rotating field in a ferrimagnet
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• Domain wall motion at low current density in a synthetic antiferromagnet nanowire
• Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
• On field-driven domain wall motion in compensated ferrimagnetic nanowires
• Building unconventional magnetic phases on graphene by H atom manipulation: From altermagnets to Lieb ferrimagnets
• Spin-torque-induced magnetization dynamics in ferrimagnets based on Landau-Lifshitz-Bloch Equation
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• Compensated magnetic insulators for extremely fast spin-orbitronics
• Novel interpretation of recent experiments on the dynamics of domain walls along ferrimagnetic strips
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• Domain Wall Motion in Magnetic Nanostrips
• Full Electrical Switching of a Freestanding Ferrimagnetic Metal for Energy-Efficient Bipolar Neuromorphic Computing
• Analytical dispersion relation for forward volume spin waves in ferrimagnets near the angular momentum compensation condition
• Current-Driven Domain Wall Motion in Curved Ferrimagnetic Strips Above and Below the Angular Momentum Compensation
• Revealing domain wall stability during ultrafast demagnetization
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• Absence of Walker breakdown in the dynamics of chiral Neel domain walls driven by in-plane strain gradients
• Efficient domain wall motion in asymmetric magnetic tunnel junctions with vertical current flow