Stochastic dynamics of magnetization in a ferromagnetic nanoparticle out of equilibrium
arXiv:0809.2611 · doi:10.1103/PhysRevB.79.064418
Abstract
We consider a small metallic particle (quantum dot) where ferromagnetism arises as a consequence of Stoner instability. When the particle is connected to electrodes, exchange of electrons between the particle and the electrodes leads to a temperature- and bias-driven Brownian motion of the direction of the particle magnetization. Under certain conditions this Brownian motion is described by the stochastic Landau-Lifshitz-Gilbert equation. As an example of its application, we calculate the frequency-dependent magnetic susceptibility of the particle in a constant external magnetic field, which is relevant for ferromagnetic resonance measurements.
15 pages, 6 figures
References in corpus (19)
- Random-Matrix Theory of Quantum Transport
- Enhanced Gilbert Damping in Thin Ferromagnetic Films
- Quantum Effects in Coulomb Blockade
- Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
- Nonequilibrium quantum criticality in open electronic systems
- Functional Keldysh Theory of Spin Torques
- Magnetization noise in magnetoelectronic nanostructures
- Dynamical and thermal effects in nanoparticle systems driven by a rotating magnetic field
- Spin-torque shot noise in magnetic tunnel junctions
- Current driven quantum criticality in itinerant electron ferromagnets
- Effective temperature and Gilbert damping of a current-driven localized spin
- Rapidly driven nanoparticles: Mean first-passage times and relaxation of the magnetic moment
- Tunable Magnetic Relaxation In Magnetic Nanoparticles
- Fluctuations of the Magnetization in Thin Films due to Conduction Electrons
- Temperature dependent magnetization dynamics of magnetic nanoparticles
- Voltage dependence of Landau-Lifshitz-Gilbert damping of a spin in a current driven tunnel junction
- Resistance noise in spin valves
- Spin Related Effects in Transport Properties of "Open" Quantum Dots
- Effect of Coulomb interaction on current noise in open quantum dots
Cited by in corpus (15)
- Current-induced switching in transport through anisotropic magnetic molecules
- Magnetism in strained graphene dots
- Geometric Quantum Noise of Spin
- Magnetic particle hyperthermia: Power losses under circularly polarized field in anisotropic nanoparticles
- Correlation Effects in the Stochastic Landau-Lifshitz-Gilbert Equation
- Strong non-equilibrium effects in spin torque systems
- Mesoscopic Stoner instability in open quantum dots: suppression of Coleman-Weinberg mechanism by electron tunneling
- Non-linear spin torque, pumping and cooling in superconductor/ferromagnet systems
- Spin pumping and torque statistics in the quantum noise limit
- Fluctuations of current-driven domain walls in the non-adiabatic regime
- Inelastic electron scattering off a quantum dot in the cotunneling regime: the signature of mesoscopic Stoner instability
- AC- and DC-driven noise and I-V characteristics of magnetic nanostructures
- Coarsening of Disordered Quantum Rotors under a Bias Voltage
- U(1) and SU(2) quantum dissipative systems: The Caldeira-Leggett vs. the Amegaokar-Eckern-Schön approaches
- Landau-Lifshitz damping from Lindbladian dissipation in quantum magnets