Nutation spectroscopy of a nanomagnet driven into deeply nonlinear ferromagnetic resonance

Abstract

Strongly out-of-equilibrium regimes in magnetic nanostructures exhibit novel properties, linked to the nonlinear nature of magnetization dynamics, which are of great fundamental and practical interest. Here, we demonstrate that field-driven ferromagnetic resonance can occur with substantial spatial coherency at unprecedented large angle of magnetization precessions, which is normally prevented by the onset of spin-wave instabilities and magnetization turbulent dynamics. Our results show that this limitation can be overcome in nanomagnets, where the geometric confinement drastically reduces the density of spin-wave modes. The obtained deeply nonlinear ferromagnetic resonance regime is probed by a new spectroscopic technique based on the application of a second excitation field. This enables to resonantly drive slow coherent magnetization nutations around the large angle periodic trajectory. Our experimental findings are well accounted for by an analytical model derived for systems with uniaxial symmetry. They also provide new means for controlling highly nonlinear magnetization dynamics in nanostructures, which open interesting applicative opportunities in the context of magnetic nanotechnologies.

References in corpus (15)

• Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
• Vowel recognition with four coupled spin-torque nano-oscillators
• Switching of magnetization by non-linear resonance studied in single nanoparticles
• Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque
• Inverse Spin Hall Effect in nanometer-thick YIG/Pt system
• Magnetization dynamics in the inertial regime: nutation predicted at short time scales
• Ferromagnetic resonance force spectroscopy of individual sub-micron size samples
• Identification and selection rules of the spin-wave eigen-modes in a normally magnetized nano-pillar
• Measurement of the intrinsic damping constant in individual nanodisks of YIG and YIG{\textbar}Pt
• Optimal control of vortex core polarity by resonant microwave pulses
• Non-linear spin-wave excitation at low bias fields
• Inertial terms to magnetization dynamics in ferromagnetic thin films
• Spin-torque driven ferromagnetic resonance in a nonlinear regime
• Quantitative MRFM characterization of the autonomous and forced dynamics in a spin transfer nano-oscillator
• Probing phase coupling between two spin-torque nano-oscillators with external source

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• Nutation Resonance in Ferromagnets
• Controlling the nonlinear relaxation of quantized propagating magnons in nanodevices
• Interplay between nonlinear spectral shift and nonlinear damping of spin waves in ultrathin YIG waveguides
• Electrical spectroscopy of the spin-wave dispersion and bistability in gallium-doped yttrium iron garnet
• Mode attraction in Floquet systems with memory: application to magnonics
• Non-local magnon transconductance in extended magnetic insulating films.\\ Part I: spin diode effect
• Parametric resonance of spin waves in ferromagnetic nanowires tuned by spin Hall torque
• Inertial dynamics and equilibrium correlation functions of magnetization at short times
• Ferromagnetic resonance modes in the exchange dominated limit in cylinders of finite length
• Nonlinear suppression of dispersion broadening of ultrashort spin-wave pulses in thin YIG films