Detection of above-NV-frequency ferromagnetic dynamics

ORAL

Abstract

The nitrogen vacancy (NV) spin in diamond can sense magnetic field noise at gigahertz frequencies due to its long spin lifetime and spin dependent fluorescence intensity. Thus far, NV sensing of ferromagnetic noise has had an upper frequency limit since NVs are relaxed by dipole fields from magnons at the NV frequency [1,2]. Here, we use microwaves to drive a low damping ferrite thin film and simultaneously detect conventional microwave absorption and NV fluorescence signals. Driving a spinwave instability in the ferrite film results in relaxation of nearby NV centers even when sufficient static field is applied to the film such that there are no NV-resonant magnon modes [3]. Recent theory [4] suggests that multiple magnons participate in producing NV-resonant magnetic field noise when the magnon population is elevated, which provides a pathway for high frequency magnetization dynamics sensing with NVs.

[1] Nat. Comm. 6, 7886 (2015)
[2] J. Appl. Phys. 126, 124902 (2019)
[3] Nat Comm. 11, 5229 (2020)
[4] Phys. Rev. Lett. 121, 187204 (2018)

*Funding provided primarily by the Center for Emergent Materials (DMR-2011876). Partial support from AFOSR (FA9550-19-1-0307 and FA9550-20RXCOR074). OSU Nanosystems Laboratory (NSF DMR-2011876) used for device fabrication.

–

Presenters

  • Brendan McCullian

    • Department of Physics, The Ohio State University
    • Ohio State Univ - Columbus

Authors

  • Brendan McCullian

    • Department of Physics, The Ohio State University
    • Ohio State Univ - Columbus

  • Ahmed Thabt

    • Department of Physics, The Ohio State University

  • Benjamin Gray

    • Materials and Manufacturing Directorate, Air Force Research Laboratory

  • Alex Melendez

    • Department of Physics, The Ohio State University

  • Michael Wolf

    • Materials and Manufacturing Directorate, Air Force Research Laboratory

  • Vladimir Safonov

    • Materials and Manufacturing Directorate, Air Force Research Laboratory

  • Denis Pelekhov

    • Ohio State Univ - Columbus
    • Department of Physics, The Ohio State University

  • Vidya P Bhallamudi

    • Department of Physics, Indian Institute of Technology, Madras

  • Michael R Page

    • Materials and Manufacturing Directorate, Air Force Research Laboratory
    • Materials and Manufacturing Directorate, Air Force National Laboratory

  • P Chris Hammel

    • Ohio State Univ - Columbus
    • Department of Physics, The Ohio State University
    • Deparment of Physics, The Ohio State University