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A single layer spin-orbit torque nano-oscillator

Author

Listed:
  • Mohammad Haidar

    (University of Gothenburg
    Chalmers University of Technology)

  • Ahmad A. Awad

    (University of Gothenburg)

  • Mykola Dvornik

    (University of Gothenburg)

  • Roman Khymyn

    (University of Gothenburg)

  • Afshin Houshang

    (University of Gothenburg)

  • Johan Åkerman

    (University of Gothenburg
    School of Engineering Sciences, KTH Royal Institute of Technology)

Abstract

Spin torque and spin Hall effect nano-oscillators generate high intensity spin wave auto-oscillations on the nanoscale enabling novel microwave applications in spintronics, magnonics, and neuromorphic computing. For their operation, these devices require externally generated spin currents either from an additional ferromagnetic layer or a material with a high spin Hall angle. Here we demonstrate highly coherent field and current tunable microwave signals from nano-constrictions in single 15–20 nm thick permalloy layers with oxide interfaces. Using a combination of spin torque ferromagnetic resonance measurements, scanning micro-Brillouin light scattering microscopy, and micromagnetic simulations, we identify the auto-oscillations as emanating from a localized edge mode of the nano-constriction driven by spin-orbit torques. Our results pave the way for greatly simplified designs of auto-oscillating nano-magnetic systems only requiring single ferromagnetic layers with oxide interfaces.

Suggested Citation

  • Mohammad Haidar & Ahmad A. Awad & Mykola Dvornik & Roman Khymyn & Afshin Houshang & Johan Åkerman, 2019. "A single layer spin-orbit torque nano-oscillator," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10120-4
    DOI: 10.1038/s41467-019-10120-4
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    Cited by:

    1. Rouven Dreyer & Alexander F. Schäffer & Hans G. Bauer & Niklas Liebing & Jamal Berakdar & Georg Woltersdorf, 2022. "Imaging and phase-locking of non-linear spin waves," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Christoph W. Zollitsch & Safe Khan & Vu Thanh Trung Nam & Ivan A. Verzhbitskiy & Dimitrios Sagkovits & James O’Sullivan & Oscar W. Kennedy & Mara Strungaru & Elton J. G. Santos & John J. L. Morton & G, 2023. "Probing spin dynamics of ultra-thin van der Waals magnets via photon-magnon coupling," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. 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.

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