Ultrafast Quenching of Ferromagnetism in InMnAs Induced by Intense Laser Irradiation

Abstract

Time-resolved magneto-optical Kerr spectroscopy of ferromagnetic InMnAs reveals two distinct {\em demagnetization} processes -- fast ($<1$ ps) and slow ($\sim$100 ps). Both components diminish with increasing temperature and are absent above the Curie temperature. The fast component rapidly grows with pump power and saturates at high fluences ($>10$ mJ/cm${}^2$); the saturation value indicates a {\em complete quenching} of ferromagnetism on a sub-picosecond time scale. We attribute this fast dynamics to spin heating through $p$-$d$ exchange interaction between photo-carriers and Mn ions while the $\sim$100 ps component is interpreted as spin-lattice relaxation.

4 pages, 4 figures

References in corpus (6)

• Spin interactions of interstitial Mn ions in ferromagnetic GaMnAs
• Magnetization relaxation in (Ga,Mn)As ferromagnetic semiconductors
• Simple theory for spin-lattice relaxation in metallic rare earth ferromagnets
• Boltzmann theory of engineered anisotropic magnetoresistance in (Ga,Mn)As
• Mean-field magnetization relaxation in conducting ferromagnets
• Observation of the spin-charge thermal isolation of ferromagnetic Ga_{0.94}Mn_{0.06}As by time-resolved magneto-optical measurement

Cited by in corpus (29)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Spin dynamics in semiconductors
• Spectral dependence of photoinduced spin precession in DyFeO3
• Photo-induced precession of magnetization in ferromagnetic (Ga,Mn)As
• Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes in GaMnAs
• Ultrafast demagnetization in the sp-d model: a theoretical study
• Theory of laser-induced demagnetization at high temperatures
• Ultrafast light-induced magnetization dynamics in ferromagnetic semiconductors
• Femtosecond Demagnetization and Hot Hole Relaxation in Ferromagnetic GaMnAs
• Femtosecond Coherent Control of Spin with Light in (Ga,Mn)As ferromagnets
• All-optical spin switching: A new frontier in femtomagnetism -- A short review and a simple theory
• Electron spin relaxation in paramagnetic Ga(Mn)As quantum wells
• Ultrafast Probes of Nonequilibrium Hole Spin Relaxation in Ferromagnetic Semiconductor GaMnAs
• Large Itinerant Electron Exchange Coupling in the Magnetic Topological Insulator MnBi2Te4
• Magnetization dynamics at elevated temperatures
• A table-top, repetitive pulsed magnet for nonlinear and ultrafast spectroscopy in high magnetic fields up to 30 T
• Femtosecond Control of the Magnetization in Ferromagnetic Semiconductors
• Ultrafast Magnetization Dynamics in Diluted Magnetic Semiconductors
• Manipulating Femtosecond Spin--Orbit Torques with Laser Pulse Sequences to Control Magnetic Memory States and Ringing
• Microscopic mechanism of the non-crystalline anisotropic magnetoresistance in (Ga,Mn)As
• Optical Orientation in Ferromagnet/Semiconductor Hybrids
• Non-thermal photocoercivity effect in a ferromagnetic semiconductor
• All-optical four-state magnetization reversal in (Ga,Mn)As ferromagnetic semiconductors
• Dynamical properties of a three-dimensional diluted Heisenberg model
• Magneto-Elastic Coupling to Coherent Acoustic Phonon Modes in Ferrimagnetic Insulator GdTiO${}_3$
• Distinguishing Surface and Bulk Electromagnetism via Their Dynamics in an Intrinsic Magnetic Topological Insulator
• The quadrupole mechanism of hole spin relaxation
• Using magnetic dynamics to measure the spin gap in a candidate Kitaev material
• Electrically driven magnetization of diluted magnetic semiconductors actuated by Overhauser effect