Large spin-wave bullet in a ferrimagnetic insulator driven by spin Hall effect

Abstract

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 Y${}_3$Fe${}_5$O${}_{12}$ based on the excitation and detection by SHEs. The driven spin dynamics in Y${}_3$Fe${}_5$O${}_{12}$ 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'.

References in corpus (24)

• The design and verification of Mumax3
• Spin Hall effect
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Spin Transfer Torques
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Quantifying spin Hall angles from spin pumping: Experiments and Theory
• Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
• Inverse Spin Hall Effect in nanometer-thick YIG/Pt system
• Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires
• Spectral Characteristics of the Microwave Emission by the Spin Hall Nano-Oscillator
• Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet (YIG)/Pt bilayers
• Electronic control of the spin-wave damping in a magnetic insulator
• Current-induced spin torque resonance of magnetic insulators
• Current-induced spin torque resonance of a magnetic insulator
• Driving and detecting ferromagnetic resonance in insulators with the spin Hall effect
• Spin waves in micro-structured yttrium iron garnet nanometer-thick films
• Temporal behavior of the inverse spin Hall voltage in a magnetic insulator-nonmagnetic metal structure
• Epitaxial patterning of nanometer-thick Y3Fe5O12 films with low magnetic damping
• Heat-induced damping modification in YIG/Pt hetero-structures
• Microwave-induced spin currents in ferromagnetic-insulator|normal-metal bilayer system
• Current-induced spin torque resonance of magnetic insulators affected by field-like spin-orbit torques and out-of-plane magnetizations
• Nonlinear mode conversion in monodomain magnetic squares

Cited by in corpus (19)

• Interface-Induced Phenomena in Magnetism
• Electrical Detection of Magnetization Dynamics via Spin Rectification Effects
• Magnetization oscillations and waves driven by pure spin currents
• Coherent spin pumping in a strongly coupled magnon-magnon hybrid system
• Long-distance spin transport in a disordered magnetic insulator
• Interface-driven spin-torque ferromagnetic resonance by Rashba coupling at the interface between non-magnetic materials
• Mapping out the spin-wave modes of constriction-based spin Hall nano-oscillators in weak in-plane fields
• High frequency dynamics modulated by collective magnetization reversal in artificial spin ice
• Insulating nanomagnets driven by spin torque
• Deficiency of the Bulk Spin Hall Effect Model for Spin-Orbit Torques in Magnetic Insulator/Heavy Metal Heterostructures
• Spin-torque oscillation in a magnetic insulator probed by a single-spin sensor
• Excitation and detection of short-waved spin waves in ultrathin Ta/CoFeB/MgO-layer system suitable for spin-orbit-torque magnonics
• Simultaneous Optical and Electrical Spin-Torque Magnetometry with Stroboscopic Detection of Spin-Precession Phase
• Imaging Magnetization Structure and Dynamics in Ultrathin YIG/Pt Bilayers with High Sensitivity Using the Time-Resolved Longitudinal Spin Seebeck Effect
• Thickness dependence study of current-driven ferromagnetic resonance in Y3Fe5O12/heavy metal bilayers
• Temporal evolution of auto-oscillations in a YIG/Pt microdisc driven by pulsed spin Hall effect-induced spin-transfer torque
• Phase-resolved electrical detection of coherently coupled magnonic devices
• Probing anisotropy in epitaxial Fe/Pt bilayers by spin-orbit torque ferromagnetic resonance
• Direct observation of dynamic modes excited in a magnetic insulator by pure spin current