Spin-torque oscillation in a magnetic insulator probed by a single-spin sensor
| Autor: | Huiliang Zhang, Caroline A. Ross, Chunhui Du, Mehmet C. Onbasli, Ronald L. Walsworth, Yaroslav Tserkovnyak, Francesco Casola, T. van der Sar, Amir Yacoby, Mark Ku |
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| Přispěvatelé: | Onbaşlı, Mehmet Cengiz (ORCID 0000-0002-3554-7810 & YÖK ID 258783), Zhang, H., Ku, M. J. H., Casola, F., Du, C. H., van der Sar, T., Ross, C. A., Tserkovnyak, Y., Yacoby, A., Walsworth, R. L., College of Engineering, Department of Electrical and Electronics Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Mesoscopic physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Oscillation FOS: Physical sciences Spectral density 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Bose-Einstein condensation Temperature Resolution Driven Magnetic field Laser linewidth Ferrimagnetism Materials science multidisciplinary Physics applied Physics condensed matter Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Spectral resolution 010306 general physics 0210 nano-technology Microwave |
| Zdroj: | Physical Review B |
| Popis: | Coherent, self-sustained oscillation of magnetization in spin-torque oscillators (STOs) is a promising source for on-chip, nanoscale generation of microwave magnetic fields. Such fields could be used for local excitation of spin-wave resonances, control of spin qubits, and studies of paramagnetic resonance. However, local characterization of fields emitted by an STO has remained an outstanding challenge. Here, we use the spin of a single nitrogen-vacancy (NV) defect in diamond to probe the magnetic fields generated by an STO in a microbar of ferromagnetic insulator yttrium-iron-garnet (YIG). 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. 12 pages, 5 figures |
| Databáze: | OpenAIRE |
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