Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect

Jungfleisch, M. B.; Zhang, W.; Sklenar, J.; Ding, J.; Jiang, W.; Chang, H.; Fradin, F. Y.; Pearson, J. E.; Ketterson, J. B.; Novosad, V.; Wu, M.; Hoffmann, A.

doi:10.1103/PhysRevLett.116.057601

Title: Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect

Journal Article · Sun Jan 31 23:00:00 EST 2016 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.116.057601 · OSTI ID:1248728

Jungfleisch, M. B. ^[1]; Zhang, W. ^[1]; Sklenar, J. ^[2]; Ding, J. ^[1]; Jiang, W. ^[1]; Chang, H. ^[3]; Fradin, F. Y. ^[1]; Pearson, J. E. ^[1]; Ketterson, J. B. ^[4]; Novosad, V. ^[1]; Wu, M. ^[3]; Hoffmann, A. ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy
Colorado State Univ., Fort Collins, CO (United States). Physics Dept.
Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy

Due to its transverse nature, spin Hall effects (SHE) provide the possibility to excite and detect spin currents and magnetization dynamics even in magnetic insulators. Magnetic insulators are outstanding materials for the investigation of nonlinear phenomena and for novel low power spintronics applications because of their extremely low Gilbert damping. Here, we report on the direct imaging of electrically driven spin-torque ferromagnetic resonance (ST-FMR) in the ferrimagnetic insulator Y₃Fe₅O₁₂ based on the excitation and detection by SHEs. The driven spin dynamics in Y₃Fe₅O₁₂ is directly imaged by spatially-resolved microfocused Brillouin light scattering (BLS) spectroscopy. Previously, ST-FMR experiments assumed a uniform precession across the sample, which is not valid in our measurements. A strong spin-wave localization in the center of the sample is observed indicating the formation of a nonlinear, self-localized spin-wave `bullet'.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-06CH11357; SC0012670

OSTI ID:: 1248728

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 116; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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