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Ferrimagnetic spintronics

Nature Materials volume 21, pages 24–34 (2022)Cite this article

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Abstract

Ferrimagnets composed of multiple and antiferromagnetically coupled magnetic elements have attracted much attention recently as a material platform for spintronics. They offer the combined advantages of both ferromagnets and antiferromagnets, namely the easy control and detection of their net magnetization by an external field, antiferromagnetic-like dynamics faster than ferromagnetic dynamics and the potential for high-density devices. This Review summarizes recent progress in ferrimagnetic spintronics, with particular attention to the most-promising functionalities of ferrimagnets, which include their spin transport, spin texture dynamics and all-optical switching.

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Fig. 1: Different classes of long-range magnetic order.
Fig. 2: All-optical magnetization switching of GdFeCo with linearly polarized light.
Fig. 3: DW and skyrmion motion in ferrimagnets.
Fig. 4: Fast motion of ferrimagnetic DW at TA.
Fig. 5: Skyrmion Hall angle in ferrimagnets.
Fig. 6: Spin coherence length in a ferrimagnetic multilayer.

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Acknowledgements

K.-J.L. acknowledges support from the Samsung Research Funding Center of Samsung Electronics under project no. SRFCMA1702-02. T.R. acknowledges support from the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) through the programme Exciting Exchange, the European Union Horizon 2020 and the innovation programme under the FET-Open grand agreement no. 713481 (SPICE), and the European Research Council ERC grant agreement no. 856538 (3D MAGiC). H.Y. is supported by SpOT-LITE programme (A*STAR grant, A18A6b0057) through RIE2020 funds, Samsung Electronics’ University R&D programme (Exotic SOT materials/SOT characterization) and a National Research Foundation (NRF) Singapore Investigatorship (NRFI06-2020-0015). G.S.D.B. acknowledges support through the DARPA ‘Topological Excitations in Electronics (TEE)’ programme. S.K.K. is supported by Brain Pool Plus Program through the National Research Foundation of Korea funded by the Ministry of Science and ICT (NRF-2020H1D3A2A03099291) and the National Research Foundation of Korea funded by the Korea Government via the SRC Center for Quantum Coherence in Condensed Matter (NRF-2016R1A5A1008184).

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Authors and Affiliations

  1. Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea

    Se Kwon Kim & Kyung-Jin Lee

  2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA

    Geoffrey S. D. Beach

  3. Department of Materials Science and Engineering, Korea University, Seoul, Korea

    Kyung-Jin Lee

  4. KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Korea

    Kyung-Jin Lee

  5. Institute of Chemical Research, Kyoto University, Kyoto, Japan

    Teruo Ono

  6. Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science, Osaka University, Osaka, Japan

    Teruo Ono

  7. Institute for Molecules and Materials, Radboud University, Nijmegen, the Netherlands

    Theo Rasing

  8. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China

    Theo Rasing

  9. Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore

    Hyunsoo Yang

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  1. Se Kwon Kim
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The manuscript was written through contributions from all authors.

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Correspondence to Kyung-Jin Lee.

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Kim, S.K., Beach, G.S.D., Lee, KJ. et al. Ferrimagnetic spintronics. Nat. Mater. 21, 24–34 (2022). https://doi.org/10.1038/s41563-021-01139-4

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