Atomistic spin model simulation of magnetic reversal modes near the Curie point

Atomistic spin model simulation of magnetic reversal modes near the Curie point

The so-called linear reversal mode is demonstrated in spin model simulations of the high anisotropy material Llo FePt. Reversal of the magnetization is found to readily occur in the linear regime despite an energy barrier (KV / kB T) that would conventionally ensure stability on this timescale. The timescale for the reversal is also established with a comparison to the Landau-Lifshitz-Bloch equ...

Atomistic spin model simulations of magnetic nanomaterials.

Atomistic modelling of magnetic materials provides unprecedented detail about the underlying physical processes that govern their macroscopic properties, and allows the simulation of complex effects such as surface anisotropy, ultrafast laser-induced spin dynamics, exchange bias, and microstructural effects. Here we present the key methods used in atomistic spin models which are then applied to...

00 2 Plasticity of Ferromagnets near the Curie Point

We propose an explanation of the anomalous growth of plasticity in ferromagnets near the Curie point. We demonstrate that this effect is caused by spin-dependent detachment of dislocations from obstacles under an influence of the internal magnetic field. Magnetization fluctuations grow in the vicinity of the Curie point, yield an increase of the detachment probability and, hence, an increase of...

Ising spin model using Spin-Hall Effect (SHE) induced magnetization reversal in Magnetic-Tunnel-Junction

Ising spin model is considered as an efficient computing method to solve combinatorial optimization problems based on its natural tendency of convergence towards low energy state. The underlying basic functions facilitating the Ising model can be categorized into two parts, “Annealing and Majority vote”. In this paper, we propose an Ising cell based on Spin Hall Effect (SHE) induced magnetizati...

Spin-wave modes in magnetic nanowires