@article{10e4c0827e874885add565df2f57cb7e,
title = "Fast domain wall motion in the vicinity of the angular momentum compensation temperature of ferrimagnets",
abstract = "Antiferromagnetic spintronics is an emerging research field which aims to utilize antiferromagnets as core elements in spintronic devices. A central motivation towards this direction is that antiferromagnetic spin dynamics is expected to be much faster than its ferromagnetic counterpart. Recent theories indeed predicted faster dynamics of antiferromagnetic domain walls (DWs) than ferromagnetic DWs. However, experimental investigations of antiferromagnetic spin dynamics have remained unexplored, mainly because of the magnetic field immunity of antiferromagnets. Here we show that fast field-driven antiferromagnetic spin dynamics is realized in ferrimagnets at the angular momentum compensation point 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 {\^a} 1 T {\^a} 1. The collective coordinate approach generalized for ferrimagnets and atomistic spin model simulations show that this remarkable enhancement is a consequence of antiferromagnetic spin dynamics at T A. 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.",
author = "Kim, {Kab Jin} and Kim, {Se Kwon} and Yuushou Hirata and Oh, {Se Hyeok} and Takayuki Tono and Kim, {Duck Ho} and Takaya Okuno and Ham, {Woo Seung} and Sanghoon Kim and Gyoungchoon Go and Yaroslav Tserkovnyak and Arata Tsukamoto and Takahiro Moriyama and Lee, {Kyung Jin} and Teruo Ono",
note = "Funding Information: 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 Funding Information: Japan Society for the Promotion of Science (JSPS). K.-J.K. was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (No. 2017R1C1B2009686, NRF-2016R1A5A1008184) and by the DGIST R&D Program of the Ministry of Science, ICT and Future Planning (17-BT-02). S.K.K. and Y.T. acknowledge support from the Army Research Office under Contract No. W911NF-14-1-0016. D.-H.K. was supported by an Overseas Researcher under Postdoctoral Fellowship of JSPS (Grant Number P16314). K.-J.L. acknowledges support from the National Research Foundation of Korea (NRF-2015M3D1A1070465, NRF-2017R1A2B2006119). Funding Information: R&D project for ICT Key Technology of MEXT from the Japan Society for the Promotion of Science (JSPS). K.-J.K. was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (No. 2017R1C1B2009686, NRF-2016R1A5A1008184) and by the DGIST R&D Program of the Ministry of Science, ICT and Future Planning (17-BT-02). S.K.K. and Y.T. acknowledge support from the Army Research Office under Contract No. W911NF-14-1-0016. D.-H.K. was supported by an Overseas Researcher under Postdoctoral Fellowship of JSPS (Grant Number P16314). K.-J.L. acknowledges support from the National Research Foundation of Korea (NRF-2015M3D1A1070465, NRF-2017R1A2B2006119). Publisher Copyright: {\textcopyright} 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.",
year = "2017",
month = dec,
day = "1",
doi = "10.1038/nmat4990",
language = "English",
volume = "16",
pages = "1187--1192",
journal = "Nature Materials",
issn = "1476-1122",
publisher = "Nature Publishing Group",
number = "12",
}