Spin-torque oscillation in a magnetic insulator probed by a single-spin sensor

Zhang, H.; Ku, Mark; Casola, Francesco; Du, Chunhui; Sar, Toeno van der; Onbaşlı, Mehmet C.; Ross, Caroline A.; Tserkovnyak, Yaroslav; Yacoby, Amir; Walsworth, Ronald L.

doi:10.1103/physrevb.102.024404

Cited by 25 publications

(26 citation statements)

References 49 publications

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“…234,235 For certain materials requiring epitaxial growth on specific substrates, patterned diamond nanostructures containing individual NV centers will be used and transferred onto the surface of samples. 9,211,[236][237][238] Thirdly, by employing scanning NV microscopy, 214,239 where a micrometersized diamond cantilever containing individual NV centers is attached to an atomic force microscope, the NVto-sample distance can be systematically controlled with nanoscale resolution.…”

Section: B Quantum Sensing Of Magnons In Spintronic Systems Using Nvmentioning

confidence: 99%

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

105

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Quantum technology has made tremendous strides over the past two decades with remarkable advances in materials engineering, circuit design and dynamic operation. In particular, the integration of different quantum modules has benefited from hybrid quantum systems, which provide an important pathway for harnessing the different natural advantages of complementary quantum systems and for engineering new functionalities. This review focuses on the current frontiers with respect to utilizing magnetic excitatons or magnons for novel quantum functionality. Magnons are the fundamental excitations of magnetically ordered solid-state materials and provide great tunability and flexibility for interacting with various quantum modules for integration in diverse quantum systems. The concomitant rich variety of physics and material selections enable exploration of novel quantum phenomena in materials science and engineering. In addition, the relative ease of generating strong coupling and forming hybrid dynamic systems with other excitations makes hybrid magnonics a unique platform for quantum engineering. We start our discussion with circuit-based hybrid magnonic systems, which are coupled with microwave photons and acoustic phonons. Subsequently, we are focusing on the recent progress of magnon-magnon coupling within confined magnetic systems. Next we highlight new opportunities for understanding the interactions between magnons and nitrogen-vacancy centers for quantum sensing and implementing quantum interconnects. Lastly, we focus on the spin excitations and magnon spectra of novel quantum materials investigated with advanced optical characterization.

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Section: B Quantum Sensing Of Magnons In Spintronic Systems Using Nvmentioning

confidence: 99%

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

105

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show abstract

“…Related recent developments in the applications aspects of the ferrimagnetic garnets are the demonstration of YIG-ferroelectric composites for magnetic eld sensors and voltage tunable high frequency devices [10][11][12][13]. YIG is also of interest for use in devices based on spin torque transfer phenomena [14,15]. In most of these applications the need for a bias magnetic eld renders their miniaturization hard to realize.…”

Section: Introductionmentioning

confidence: 99%

Growth Induced Magnetic Anisotropy in Yttrium Iron Garnet Films on Yttrium Aluminum Garnet Substrates

Sriniva

Liu

Zhou

et al. 2022

Preprint

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Yttrium iron garnet (YIG) is a ferrimagnetic oxide of importance for a variety of applications including magnetic field sensors and microwave signal processing devices. Most of the applications, however, require a bias magnetic field that impedes miniaturization of YIG based sensors and communication devices. This work is aimed at strain engineering of YIG films to realize an induced magnetic anisotropy field that could act as a built-in bias field. We discuss here pulsed laser deposition (PLD) and characterization of YIG films on yttrium aluminum garnet (YAG) substrates. One expects the − 3% lattice mismatch between the film and substrate to result in an in-plane compressive strain and out-of-plane tensile strain. Films with thickness 55 nm to 380 nm were deposited on (100), (110), and (111) YAG substrates and annealed at high temperatures were characterized by structural and magnetic characterization techniques. The uniaxial out-of-plane strain anisotropy field estimated from X-ray diffraction data varied from 0.5 to 4.kOe for the films, showed an increase with increasing film thickness, and the highest values were for films on (100)YAG. Ferromagnetic resonance (FMR) measurements at 5 to 10 GHz also revealed the presence of a growth induced uniaxial anisotropy field as high as 450 Oe in the films, that decreased with increasing film thickness. The FMR line-width varied from 19.5 Oe to 82 Oe with films on (100) YAG showing the smallest values. The PLD YIG films on YAG substrates exhibiting a large perpendicular anisotropy field have the potential for use in sensors and high frequency devices.

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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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Spin-torque oscillation in a magnetic insulator probed by a single-spin sensor

Cited by 25 publications

References 49 publications

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Growth Induced Magnetic Anisotropy in Yttrium Iron Garnet Films on Yttrium Aluminum Garnet Substrates

Sensing chiral magnetic noise via quantum impurity relaxometry

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