Imaging non-collinear antiferromagnetic textures via single spin relaxometry

Finco, Aurore; Haykal, Angela; Tanos, Rana; Fabre, F.; Chouaieb, S.; Akhtar, Waseem; Robert-Philip, I.; Legrand, William; Ajejas, Fernando; Bouzéhouane, K.; Reyren, Nicolas; Devolder, T.; Adam, Jean-Paul; Kim, Joo-Von; Cros, Vincent; Jacques, Vincent

doi:10.1038/s41467-021-20995-x

Cited by 78 publications

(65 citation statements)

References 43 publications

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“…Quantum impurity (QI) relaxometry [7,8]-a sensing scheme measuring the relaxation rate of an impurity spin due to its coupling with magnetic noise [9][10][11][12]-has recently emerged as a sensitive, local, and noninvasive technique for probing condensed-matter systems including magnetic materials [13][14][15][16][17][18][19][20][21]. QIs coupled to magnetic thin films form model systems for developing an understanding of decoherence introduced in qubits that are in close proximity to magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Sensing chiral magnetic noise via quantum impurity relaxometry

et al. 2020

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We present a theory for quantum impurity relaxometry of magnons in thin films, exhibiting quantitative agreement with recent experiments without needing arbitrary scale factors used in theoretical models thus far. Our theory reveals that chiral coupling between prototypical spin>1/2 quantum impurities and magnons plays a central role in determining impurity relaxation, which is further corroborated by our experiments on nickel films interfaced with nitrogen-vacancy centers. Along with advancing magnonics and understanding decoherence in hybrid quantum platforms with magnets, the ability of a quantum impurity spin to sense chiral magnetic noise presents an opportunity to probe chiral phenomena in condensed matter.

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Section: Introductionmentioning

confidence: 99%

Sensing chiral magnetic noise via quantum impurity relaxometry

et al. 2020

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“…In the next few years, we expect that NV-probing of spin waves will expand to different materials and phenomena. The detection of spin waves in synthetic antiferromagnets was a recent success in the field [162]. A key challenge is to expand the detection capabilities to spin-wave modes that cannot be tuned into resonance with the NV spins.…”

Section: Magnetic Imaging Of Spin Waves Using Spins In Diamondmentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

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“…The NV center in diamond 1 is the leading contender in quantum sensing applications 2 realized by optically addressable point defect qubits. 3 Recent developments in NV relaxometry [4][5][6][7][8][9] , where the variation of the longitudinal spin relaxation time is detected by optical means, have made high temperature microwave-free sensing applications possible. Sensing at low magnetic field with such sensors is, however, not possible due to the large zero-field-splitting of the triplet ground state, which requires a bias field of approximately 100 mT to bring the spin states to near degeneracy.…”

Section: Introductionmentioning

confidence: 99%

Low-field microwave-free sensors using dipolar spin relaxation of quartet spin states in silicon carbide

Bulancea-Lindvall¹,

Eiles²,

Són³

et al. 2022

Preprint

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Paramagnetic defects and nuclear spins are the major sources of magnetic field-dependent spin relaxation in point defect quantum bits. The detection of related optical signals has led to the development of advanced relaxometry applications with high spatial resolution. The nearly degenerate quartet ground state of the silicon vacancy qubit in silicon carbide (SiC) is of special interest in this respect, as it gives rise to relaxation rate extrema at vanishing magnetic field values and emits in the first near-infra-red transmission window of biological tissues, providing an opportunity for developing novel sensing applications for medicine and biology. However, the relaxation dynamics of the silicon vacancy center in SiC have not yet been fully explored. In this paper, we present results from a comprehensive theoretical investigation of the dipolar spin relaxation of the quartet spin states in various local spin environments. We discuss the underlying physics and quantify the magnetic field and spin bath dependent relaxation time T 1 . Using these findings we demonstrate that the silicon vacancy qubit in SiC can implement microwave-free low magnetic field quantum sensors of great potential.

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Imaging non-collinear antiferromagnetic textures via single spin relaxometry

Cited by 78 publications

References 43 publications

Sensing chiral magnetic noise via quantum impurity relaxometry

Sensing chiral magnetic noise via quantum impurity relaxometry

Advances in Magnetics Roadmap on Spin-Wave Computing

Low-field microwave-free sensors using dipolar spin relaxation of quartet spin states in silicon carbide

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