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

We locally probe the magnetic fields generated by a spin-torque oscillator (STO) in a microbar of ferrimagnetic insulator yttrium-iron-garnet using the spin of a single nitrogen-vacancy (NV) center in diamond. The combined spectral resolution and sensitivity of the NV sensor allows us to resolve mul...

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Published in:Physical review. B 2020-07, Vol.102 (2), p.1, Article 024404
Main Authors: Zhang, H., Ku, M. J. H., Casola, F., Du, C. H. R., van der Sar, T., Onbasli, M. C., Ross, C. A., Tserkovnyak, Y., Yacoby, A., Walsworth, R. L.
Format: Article
Language:English
Subjects:
Damping
Diamonds
Ferrimagnetism
Mapping
Power spectral density
Spectral resolution
Spectral sensitivity
Synchronism
Torque
Yttrium
Yttrium-iron garnet
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cited_by cdi_FETCH-LOGICAL-c343t-afa934a70dcea01c2e6e42891b02cf219b5d5ac53484c1f52ebffd85b4c098f53
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container_issue 2
container_start_page 1
container_title Physical review. B
container_volume 102
creator Zhang, H.
Ku, M. J. H.
Casola, F.
Du, C. H. R.
van der Sar, T.
Onbasli, M. C.
Ross, C. A.
Tserkovnyak, Y.
Yacoby, A.
Walsworth, R. L.
description We locally probe the magnetic fields generated by a spin-torque oscillator (STO) in a microbar of ferrimagnetic insulator yttrium-iron-garnet using the spin of a single nitrogen-vacancy (NV) center in diamond. The combined spectral resolution and sensitivity of the NV sensor allows us to resolve multiple spin-wave modes and characterize their damping. When damping is decreased sufficiently via spin injection, the modes auto-oscillate, as indicated by a strongly reduced linewidth, a diverging magnetic power spectral density, and synchronization of the STO frequency to an external microwave source. These results open the way for quantitative, nanoscale mapping of the microwave signals generated by STOs, as well as harnessing STOs as local probes of mesoscopic spin systems.
doi_str_mv 10.1103/PhysRevB.102.024404
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Damping
Diamonds
Ferrimagnetism
Mapping
Power spectral density
Spectral resolution
Spectral sensitivity
Synchronism
Torque
Yttrium
Yttrium-iron garnet
title Spin-torque oscillation in a magnetic insulator probed by a single-spin sensor
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