Temperature dependent magnetization dynamics of magnetic nanoparticles

Abstract

Recent experimental and theoretical studies show that the switching behavior of magnetic nanoparticles can be well controlled by external time-dependent magnetic fields. In this work, we inspect theoretically the influence of the temperature and the magnetic anisotropy on the spin-dynamics and the switching properties of single domain magnetic nanoparticles (Stoner-particles). Our theoretical tools are the Landau-Lifshitz-Gilbert equation extended as to deal with finite temperatures within a Langevine framework. Physical quantities of interest are the minimum field amplitudes required for switching and the corresponding reversal times of the nanoparticle's magnetic moment. In particular, we contrast the cases of static and time-dependent external fields and analyze the influence of damping for a uniaxial and a cubic anisotropy.

accepted by Journal of Physics: Condensed Matter

References in corpus (4)

• Magnetization reversal through synchronization with a microwave
• Theoretical limit of the minimal magnetization switching field and the optimal field pulse for Stoner particles
• Dynamical and thermal effects in nanoparticle systems driven by a rotating magnetic field
• Magnetization of nanoparticle systems in a rotating magnetic field

Cited by in corpus (8)

• Thermal fluctuations of magnetic nanoparticles
• Magnetophononics: ultrafast spin control through the lattice
• Local control of ultrafast dynamics in magnetic nanoparticles
• On the longitudinal spin current induced by a temperature gradient in a ferromagnetic insulator
• Stochastic dynamics of magnetization in a ferromagnetic nanoparticle out of equilibrium
• Correlation Effects in the Stochastic Landau-Lifshitz-Gilbert Equation
• Beating the superparamagnetic size limit of nanoparticles on a ferroelectric substrate
• Finite-size effects on the magnetoelectric response of field-driven ferroelectric/ferromagnetic chains