Qualitatively different injection locking behavior of distinctly different spin Hall nano-oscillator modes

ORAL

Abstract

Spin Hall nano-oscillators (SHNOs) can sustain a number of different auto-oscillating modes [1-3], among which, the solitonic spin wave (SW) bullet can exhibit a finite power threshold to injection locking [4]. Here, we study injection locking of three distinctly different SW modes (edge mode, interior mode, and bullet) in a single 150 nm wide Pt(5 nm)/NiFe(5 nm) SHNO, observed individually by varying the applied field conditions, and find that the bullet indeed exhibits a pronounced threshold whereas the two non-soliton modes do not. We also find that both the bullet and the interior mode show a square dependence of the locking range on injected power while the edge mode locking range is linear in injected power. Theoretical models for these observations will be discussed.

[1] M. Dvornik et al., Phys. Rev. Appl. 9, 014017 (2018)

[2] H. Mazraati et al., Phys. Rev. Appl. 10, 054017 (2018)

[3] H. Fulara et al., Sci. Adv. 5, eaax8467 (2019)

[4] V. E. Demidov et al., Nat. Comm. 5, 3179 (2014)

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Presenters

  • Mona Rajabali

    • University of Gothenburg

Authors

  • Mona Rajabali

    • University of Gothenburg

  • Ahmad Awad

    • Gothenburg University
    • Physics Department, University of Gothenburg

  • Jinjin Yue

    • University of Gothenburg

  • Mykola Dvornik

    • NanOsc AB
    • NanOsc AB, Gothenburg, Sweden.
    • University of Gothenburg, Sweden
    • Physics Department, University of Gothenburg, 412 96 Gothenburg, Sweden.

  • Roman Khymyn

    • University of Gothenburg, Sweden
    • University of Gothenburg
    • Physics Department, University of Gothenburg
    • Physics Department, University of Gothenburg, 412 96 Gothenburg, Sweden

  • Mohammad Zahedinejad

    • University of Gothenburg
    • NanOsc AB, Gothenburg, Sweden

  • Himanshu Fulara

    • Indian Institute of Technology Roorkee
    • 1Physics Department, University of Gothenburg, 41296 Gothenburg, Sweden. 2Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
    • Indian Institute of Technology Roorkee, India
    • Physics Department, University of Gothenburg

  • Johan Åkerman

    • Goteborg Univ
    • University of Gothenburg
    • 1Physics Department, University of Gothenburg, 41296 Gothenburg, Sweden.
    • University of Gothenburg, Sweden
    • Physics Department, University of Gothenburg
    • Physics Department, University of Gothenburg, 412 96 Gothenburg, Sweden

  • Afshin Houshang

    • University of Gothenburg
    • 1Physics Department, University of Gothenburg, 41296 Gothenburg, Sweden.
    • Physics Department, University of Gothenburg