Probing spin transfer effects with a nitrogen-vacancy center in diamond

Solyom, Adrian; Flansberry, Zackary; Tschudin, Märta A.; Leitao, Nathaniel; Pioro‐Ladrière, Michel; Sankey, J. C.; Childress, Lilian

doi:10.1364/dp.2019.21

Symposium Latsis 2019 on Diamond Photonics - Physics, Technologies and Applications 2019

DOI: 10.1364/dp.2019.21

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Probing spin transfer effects with a nitrogen-vacancy center in diamond

Adrian Solyom¹,

Zackary Flansberry²,

Märta A. Tschudin³

et al.

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“…Electric current flowing in the plane of a ferromagnetic (FM)/nonmagnetic (NM) bilayer can apply spinorbit torque (SOT) to magnetization of the FM [1][2][3][4][5][6][7][8] . The simplest example of such a SOT is spin Hall torque (SHT) arising from pure spin current in the NM layer that flows in the direction orthogonal to both the charge current and the FM/NM interface [9][10][11][12][13] .…”

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Giant magnetoresistance amplifier for spin-orbit torque nano-oscillators

Chen,

Smith,

Montoya

et al. 2019

Preprint

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Spin-orbit torque nano-oscillators based on bilayers of ferromagnetic (FM) and nonmagnetic (NM) metals are ultra-compact current-controlled microwave signal sources. They serve as a convenient testbed for studies of spin-orbit torque physics and are attractive for practical applications such as microwave assisted magnetic recording, neuromorphic computing, and chip-to-chip wireless communications. However, a major drawback of these devices is low output microwave power arising from the relatively small anisotropic magnetoresistance (AMR) of the FM layer. Here we experimentally show that the output power of a spin-orbit torque nano-oscillator can be enhanced by nearly three orders of magnitude without compromising its structural simplicity. Addition of a FM reference layer to the oscillator allows us to employ current-in-plane giant magnetoresistance (CIP GMR) to boost the output power of the device. This enhancement of the output power is a result of both large magnitude of GMR compared to that of AMR and different angular dependences of GMR and AMR. Our results pave the way for practical applications of spin-orbit torque nano-oscillators.

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confidence: 99%

Giant magnetoresistance amplifier for spin-orbit torque nano-oscillators

Chen,

Smith,

Montoya

et al. 2019

Preprint

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Probing spin transfer effects with a nitrogen-vacancy center in diamond

Cited by 1 publication

References 6 publications

Giant magnetoresistance amplifier for spin-orbit torque nano-oscillators

Giant magnetoresistance amplifier for spin-orbit torque nano-oscillators

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