Kab-Jin Kim and Se Kwon Kim: These authors contributed equally to this work.In The Vicinity David O'Meara gives us a new kind of cityscape, one that brings its unseen, and usually unsung, materials to the foreground. acknowledges support from the National Research Foundation of Korea (NRF-2015M3D1A1070465, NRF-2017R1A2B2006119). was supported by an Overseas Researcher under Postdoctoral Fellowship of JSPS (Grant Number P16314). acknowledge support from the Army Research Office under Contract No. 2017R1C1B2009686, NRF-2016R1A5A1008184) and by the DGIST R&D Program of the Ministry of Science, ICT and Future Planning (17-BT-02). was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (No. This work was partly supported by JSPS KAKENHI Grant Numbers 15H05702, 26870300, 26870304, 26103002, 25220604, 2604316 Collaborative Research Program of the Institute for Chemical Research, Kyoto University, the Cooperative Research Project Program of the Research Institute of Electrical Communication, Tohoku University, and R&D project for ICT Key Technology of MEXT from the Japan Society for the Promotion of Science (JSPS).
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Temperature dependence of current-induced magnetization switching in spin valves with a ferrimagnetic CoGd free layer. Investigation of domain wall motion in RE-TM magnetic wire towards a current driven memory and logic. Subpicosecond magnetization reversal across ferrimagnetic compensation points. Propagation of a domain wall in a submicrometer magnetic wire. Observation of asymmetry in domain wall speed under transverse magnetic field. Chiral magnetic domain wall in ferrimagnetic GdFeCo wires. Soliton-like magnetic domain wall motion induced by the interfacial Dzyaloshinskii–Moriya interaction. The effect of the spin-orbit interaction on the electronic structure of magnetic materials. Review of gyromagnetic ratio experiments. On the gyromagnetic ratio and spectroscopic splitting factor of ferromagnetic substances. Microwave resonance in ferrimagnetic substance. Electronic-structure calculations for amorphous and crystalline Gd33Fe67 alloys. Temperature dependence of magnetoresistance in GdFeCo/Pt heterostructure.
Transient ferromagnetic-like state mediating ultrafast reversal of antiferromagnetically coupled spins. Dynamics of a vortex domain wall in a magnetic nanostrip: application of the collective-coordinate approach. Magnetization dynamics of the ferrimagnet CoGd near the compensation of magnetization and angular momentum.
Ultrafast spin dynamics across compensation points in ferrimagnetic GdFeCo: the role of angular momentum compensation. Sublattice effects in magnetic resonance. Domain-wall velocities of up to 750 m s −1 driven by exchange-coupling torque in synthetic antiferromagnets. The motion of 180° domain walls in uniform dc magnetic fields. Real-space observation of current-driven domain wall motion in submicron magnetic wires. Atomistic spin model simulations of magnetic nanomaterials. Staggered dynamics in antiferromagnets by collective coordinates. Dynamics of domain walls in weak ferromagnets.
Antiferromagnetic domain wall motion induced by spin waves. Antiferromagnetic domain wall motion driven by spin-orbit torques. High antiferromagnetic domain wall velocity induced by Néel spin-orbit torques. Our finding allows us to investigate the physics of antiferromagnetic spin dynamics and highlights the importance of tuning of the angular momentum compensation point of ferrimagnets, which could be a key towards ferrimagnetic spintronics. The collective coordinate approach generalized for ferrimagnets 8 and atomistic spin model simulations 6, 9 show that this remarkable enhancement is a consequence of antiferromagnetic spin dynamics at T A. Using rare earth–3d-transition metal ferrimagnetic compounds where net magnetic moment is nonzero at T A, the field-driven DW mobility is remarkably enhanced up to 20 km s −1 T −1. Here we show that fast field-driven antiferromagnetic spin dynamics is realized in ferrimagnets at the angular momentum compensation point T A. However, experimental investigations of antiferromagnetic spin dynamics have remained unexplored, mainly because of the magnetic field immunity of antiferromagnets 7. Recent theories indeed predicted faster dynamics of antiferromagnetic domain walls (DWs) than ferromagnetic DWs 4, 5, 6. A central motivation towards this direction is that antiferromagnetic spin dynamics is expected to be much faster than its ferromagnetic counterpart 3. Antiferromagnetic spintronics is an emerging research field which aims to utilize antiferromagnets as core elements in spintronic devices 1, 2.
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