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Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing

Development of sensitive local probes of magnon dynamics is essential to further understand the physical processes that govern magnon generation, propagation, scattering, and relaxation. Quantum spin sensors like the NV center in diamond have long spin lifetimes and their relaxation can be used to s...

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Autores principales: McCullian, Brendan A., Thabt, Ahmed M., Gray, Benjamin A., Melendez, Alex L., Wolf, Michael S., Safonov, Vladimir L., Pelekhov, Denis V., Bhallamudi, Vidya P., Page, Michael R., Hammel, P. Chris
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7568545/
https://www.ncbi.nlm.nih.gov/pubmed/33067420
http://dx.doi.org/10.1038/s41467-020-19121-0
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author McCullian, Brendan A.
Thabt, Ahmed M.
Gray, Benjamin A.
Melendez, Alex L.
Wolf, Michael S.
Safonov, Vladimir L.
Pelekhov, Denis V.
Bhallamudi, Vidya P.
Page, Michael R.
Hammel, P. Chris
author_facet McCullian, Brendan A.
Thabt, Ahmed M.
Gray, Benjamin A.
Melendez, Alex L.
Wolf, Michael S.
Safonov, Vladimir L.
Pelekhov, Denis V.
Bhallamudi, Vidya P.
Page, Michael R.
Hammel, P. Chris
author_sort McCullian, Brendan A.
collection PubMed
description Development of sensitive local probes of magnon dynamics is essential to further understand the physical processes that govern magnon generation, propagation, scattering, and relaxation. Quantum spin sensors like the NV center in diamond have long spin lifetimes and their relaxation can be used to sense magnetic field noise at gigahertz frequencies. Thus far, NV sensing of ferromagnetic dynamics has been constrained to the case where the NV spin is resonant with a magnon mode in the sample meaning that the NV frequency provides an upper bound to detection. In this work we demonstrate ensemble NV detection of spinwaves generated via a nonlinear instability process where spinwaves of nonzero wavevector are parametrically driven by a high amplitude microwave field. NV relaxation caused by these driven spinwaves can be divided into two regimes; one- and multi-magnon NV relaxometry. In the one-magnon NV relaxometry regime the driven spinwave frequency is below the NV frequencies. The driven spinwave undergoes four-magnon scattering resulting in an increase in the population of magnons which are frequency matched to the NVs. The dipole magnetic fields of the NV-resonant magnons couple to and relax nearby NV spins. The amplitude of the NV relaxation increases with the wavevector of the driven spinwave mode which we are able to vary up to 3 × 10(6) m(−1), well into the part of the spinwave spectrum dominated by the exchange interaction. Increasing the strength of the applied magnetic field brings all spinwave modes to higher frequencies than the NV frequencies. We find that the NVs are relaxed by the driven spinwave instability despite the absence of any individual NV-resonant magnons, suggesting that multiple magnons participate in creating magnetic field noise below the ferromagnetic gap frequency which causes NV spin relaxation.
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spelling pubmed-75685452020-10-21 Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing McCullian, Brendan A. Thabt, Ahmed M. Gray, Benjamin A. Melendez, Alex L. Wolf, Michael S. Safonov, Vladimir L. Pelekhov, Denis V. Bhallamudi, Vidya P. Page, Michael R. Hammel, P. Chris Nat Commun Article Development of sensitive local probes of magnon dynamics is essential to further understand the physical processes that govern magnon generation, propagation, scattering, and relaxation. Quantum spin sensors like the NV center in diamond have long spin lifetimes and their relaxation can be used to sense magnetic field noise at gigahertz frequencies. Thus far, NV sensing of ferromagnetic dynamics has been constrained to the case where the NV spin is resonant with a magnon mode in the sample meaning that the NV frequency provides an upper bound to detection. In this work we demonstrate ensemble NV detection of spinwaves generated via a nonlinear instability process where spinwaves of nonzero wavevector are parametrically driven by a high amplitude microwave field. NV relaxation caused by these driven spinwaves can be divided into two regimes; one- and multi-magnon NV relaxometry. In the one-magnon NV relaxometry regime the driven spinwave frequency is below the NV frequencies. The driven spinwave undergoes four-magnon scattering resulting in an increase in the population of magnons which are frequency matched to the NVs. The dipole magnetic fields of the NV-resonant magnons couple to and relax nearby NV spins. The amplitude of the NV relaxation increases with the wavevector of the driven spinwave mode which we are able to vary up to 3 × 10(6) m(−1), well into the part of the spinwave spectrum dominated by the exchange interaction. Increasing the strength of the applied magnetic field brings all spinwave modes to higher frequencies than the NV frequencies. We find that the NVs are relaxed by the driven spinwave instability despite the absence of any individual NV-resonant magnons, suggesting that multiple magnons participate in creating magnetic field noise below the ferromagnetic gap frequency which causes NV spin relaxation. Nature Publishing Group UK 2020-10-16 /pmc/articles/PMC7568545/ /pubmed/33067420 http://dx.doi.org/10.1038/s41467-020-19121-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
McCullian, Brendan A.
Thabt, Ahmed M.
Gray, Benjamin A.
Melendez, Alex L.
Wolf, Michael S.
Safonov, Vladimir L.
Pelekhov, Denis V.
Bhallamudi, Vidya P.
Page, Michael R.
Hammel, P. Chris
Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
title Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
title_full Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
title_fullStr Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
title_full_unstemmed Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
title_short Broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
title_sort broadband multi-magnon relaxometry using a quantum spin sensor for high frequency ferromagnetic dynamics sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7568545/
https://www.ncbi.nlm.nih.gov/pubmed/33067420
http://dx.doi.org/10.1038/s41467-020-19121-0
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