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Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin–orbit torque

Author

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  • M. Collet

    (Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay)

  • X. de Milly

    (Service de Physique de l'État Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, Orme des Merisiers)

  • O. d’Allivy Kelly

    (Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay)

  • V. V. Naletov

    (INAC-SPINTEC, CEA, CNRS and Université Grenoble Alpes
    Institute of Physics, Kazan Federal University)

  • R. Bernard

    (Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay)

  • P. Bortolotti

    (Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay)

  • J. Ben Youssef

    (Laboratoire de Magnétisme de Bretagne CNRS, Université de Bretagne Occidentale)

  • V. E. Demidov

    (University of Muenster)

  • S. O. Demokritov

    (University of Muenster
    Institute of Metal Physics)

  • J. L. Prieto

    (Instituto de Sistemas Optoelectrónicos y Microtecnologa (UPM), Ciudad Universitaria)

  • M. Muñoz

    (IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, Madrid E-28760, Spain)

  • V. Cros

    (Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay)

  • A. Anane

    (Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay)

  • G. de Loubens

    (Service de Physique de l'État Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, Orme des Merisiers)

  • O. Klein

    (INAC-SPINTEC, CEA, CNRS and Université Grenoble Alpes)

Abstract

In recent years, spin–orbit effects have been widely used to produce and detect spin currents in spintronic devices. The peculiar symmetry of the spin Hall effect allows creation of a spin accumulation at the interface between a metal with strong spin–orbit interaction and a magnetic insulator, which can lead to a net pure spin current flowing from the metal into the insulator. This spin current applies a torque on the magnetization, which can eventually be driven into steady motion. Tailoring this experiment on extended films has proven to be elusive, probably due to mode competition. This requires the reduction of both the thickness and lateral size to reach full damping compensation. Here we show clear evidence of coherent spin–orbit torque-induced auto-oscillation in micron-sized yttrium iron garnet discs of thickness 20 nm. Our results emphasize the key role of quasi-degenerate spin-wave modes, which increase the threshold current.

Suggested Citation

  • M. Collet & X. de Milly & O. d’Allivy Kelly & V. V. Naletov & R. Bernard & P. Bortolotti & J. Ben Youssef & V. E. Demidov & S. O. Demokritov & J. L. Prieto & M. Muñoz & V. Cros & A. Anane & G. de Loub, 2016. "Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin–orbit torque," Nature Communications, Nature, vol. 7(1), pages 1-8, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10377
    DOI: 10.1038/ncomms10377
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    Cited by:

    1. Dongsheng Yang & Taeheon Kim & Kyusup Lee & Chang Xu & Yakun Liu & Fei Wang & Shishun Zhao & Dushyant Kumar & Hyunsoo Yang, 2024. "Spin-orbit torque manipulation of sub-terahertz magnons in antiferromagnetic α-Fe2O3," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Haowen Ren & Xin Yu Zheng & Sanyum Channa & Guanzhong Wu & Daisy A. O’Mahoney & Yuri Suzuki & Andrew D. Kent, 2023. "Hybrid spin Hall nano-oscillators based on ferromagnetic metal/ferrimagnetic insulator heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. B. Divinskiy & H. Merbouche & V. E. Demidov & K. O. Nikolaev & L. Soumah & D. Gouéré & R. Lebrun & V. Cros & Jamal Ben Youssef & P. Bortolotti & A. Anane & S. O. Demokritov, 2021. "Evidence for spin current driven Bose-Einstein condensation of magnons," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    4. Man Yang & Liang Sun & Yulun Zeng & Jun Cheng & Kang He & Xi Yang & Ziqiang Wang & Longqian Yu & Heng Niu & Tongzhou Ji & Gong Chen & Bingfeng Miao & Xiangrong Wang & Haifeng Ding, 2024. "Highly efficient field-free switching of perpendicular yttrium iron garnet with collinear spin current," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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