Magnetization damping in noncollinear spin valves with antiferromagnetic interlayer couplings

Abstract

We study the magnetic damping in the simplest of synthetic antiferromagnets, i.e. antiferromagnetically exchange-coupled spin valves in which applied magnetic fields tune the magnetic configuration to become noncollinear. We formulate the dynamic exchange of spin currents in a noncollinear texture based on the spindiffusion theory with quantum mechanical boundary conditions at the ferrromagnet|normal-metal interfaces and derive the Landau-Lifshitz-Gilbert equations coupled by the static interlayer non-local and the dynamic exchange interactions. We predict non-collinearity-induced additional damping that can be sensitively modulated by an applied magnetic field. The theoretical results compare favorably with published experiments.

9 pages, 5 figures

References in corpus (16)

• Spin Transfer Torques
• Room-temperature antiferromagnetic memory resistor
• Antiferromagnonic Spin Transport from Y${}_3$Fe${}_5$O${}_{12}$ into NiO
• Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Spin transfer in an antiferromagnet
• Anti-damping spin transfer torque through epitaxial Nickel oxide
• Spin-transfer torques in anti-ferromagnetic metals from first principles
• Effect of Polarized Current on the Magnetic State of Antiferromagnet
• Ab-initio GMR and current-induced torques in Au/Cr multilayers
• Current-induced spin torque resonance of magnetic insulators
• Enhancement of the Gilbert damping constant due to spin pumping in noncollinear ferromagnet/nonmagnet/ferromagnet trilayer systems
• Current-induced spin torque resonance of magnetic insulators affected by field-like spin-orbit torques and out-of-plane magnetizations
• Spin Waves in Ferromagnetic Insulators Coupled via a Normal Metal
• Field-Free Synthetic-Ferromagnet Spin Torque Oscillator
• Current-induced magnetization dynamics in two magnetic insulators separated by a normal metal

Cited by in corpus (14)

• Tunable magnon-magnon coupling in synthetic antiferromagnets
• Strong Magnon-Magnon Coupling in Synthetic Antiferromagnets
• Non-Reciprocal Spin Pumping in Asymmetric Magnetic Trilayers
• Cross-sublattice Spin Pumping and Magnon Level Attraction in van der Waals Antiferromagnets
• Ferromagnetic resonance of exchange-coupled perpendicularly magnetized bilayers
• Magnetization Dynamics in Synthetic Antiferromagnets with Perpendicular Magnetic Anisotropy
• Gilbert damping in non-collinear magnetic system
• Parity-controlled spin-wave excitations in synthetic antiferromagnets
• Phase dynamics of oscillating magnetizations coupled via spin pumping
• Anisotropic and controllable Gilbert-Bloch dissipation in spin valves
• Spin-current driven spontaneous coupling of ferromagnets
• Spin relaxation in multilayers with synthetic ferrimagnets
• Theory of tensorial magnetic inertia in terahertz spin dynamics
• Charge conservation in spin torque oscillators leads to a self-induced torque