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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