Light-Induced Magnetic Precession in (Ga,Mn)As Slabs: Hybrid Standing-Wave Damon-Eshbach Modes

Abstract

Coherent oscillations associated with spin precessions were observed in ultrafast optical experiments on ferromagnetic (Ga,Mn)As films. Using a complete theoretical description of the processes by which light couples to the magnetization, values for the exchange and anisotropy constants were obtained from the field-dependence of the magnon frequencies and the oscillation-amplitude ratios. Results reveal a relatively large negative contribution to the energy due to surface anisotropy leading to excitations that are a mixture of bulk waves and surface modes.

17 pages, 4 figures

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Cited by in corpus (20)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Spin dynamics in semiconductors
• Spin-dependent phenomena and device concepts explored in (Ga,Mn)As
• Experimental observation of the optical spin transfer torque
• Photo-induced precession of magnetization in ferromagnetic (Ga,Mn)As
• Selective spin wave excitation in ferromagnetic (Ga,Mn)As layers by picosecond strain pulses
• Experimental observation of the optical spin-orbit torque
• Femtosecond Coherent Control of Spin with Light in (Ga,Mn)As ferromagnets
• Theory of magnetization precession induced by a picosecond strain pulse in ferromagnetic semiconductor (Ga,Mn)As
• Theory of spin waves in ferromagnetic (Ga,Mn)As
• Coherent manipulation of magnetization precession in ferromagnetic semiconductor (Ga,Mn)As with successive optical pumping
• Manipulating Femtosecond Spin--Orbit Torques with Laser Pulse Sequences to Control Magnetic Memory States and Ringing
• Spin waves in magnetic quantum wells with Coulomb interaction and $sd$ exchange coupling
• Angle-Dependent Spin-Wave Resonance Spectroscopy of (Ga,Mn)As Films
• All-optical four-state magnetization reversal in (Ga,Mn)As ferromagnetic semiconductors
• Mechanism of photo-excited precession of magnetization in (Ga,Mn)As on the basis of time-resolved spectroscopy
• Comparison of micromagnetic parameters of ferromagnetic semiconductors (Ga,Mn)(As,P) and (Ga,Mn)As
• Dynamical Corrections to Spin Wave Excitations in Quantum Wells due to Coulomb Interactions and Magnetic Ions
• Collective magnetization dynamics in ferromagnetic (Ga,Mn)As mediated by photo-excited carriers
• Establishing micromagnetic parameters of ferromagnetic semiconductor (Ga,Mn)As