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As data transfer rates increase within the magnetic recording
industry, improvements in device performance and reliability
crucially depend on the thorough understanding of nonlinear
magnetization dynamics at a sub-nanoscale level.
This book offers a modern, stimulating approach to the subject of
nonlinear magnetization dynamics by discussing important aspects
such as the Landau-Lifshitz-Gilbert (LLG) equation, analytical
solutions, and the connection between the general topological and
structural aspects of dynamics.
An advanced reference for the study and understanding of nonlinear
magnetization dynamics, it addresses situations such as the
understanding of spin dynamics in short time scales and device
performance and reliability in magnetic recording. Topics covered
include nonlinear magnetization dynamics and the
Landau-Lifshitz-Gilbert equation, nonlinear dynamical systems, spin
waves, ferromagnetic resonance and pulsed magnetization switching.
The book explains how to derive exact analytical solutions for the
complete nonlinear problem and emphasises the connection between
the general topological and structural aspects of nonlinear
magnetization dynamics and the discretization schemes better suited
to its numerical study. It is an exceptional research tool
providing an advanced understanding of the study of magnetization
dynamics in situations of fundamental and technological interest.
This book provides a comprehensive treatment of the physics of
hysteresis in magnetism and of the mathematical tools used to
describe it. Hysteresis in Magnetism discusses from a unified
viewpoint the relationsof hysteresis to Maxwells equations,
equilibrium and non-equilibrium thermodynamics, non-linear system
dynamics, micromagnetics, and domain theory. These aspects are then
applied to the interpretation of magnetization reversal mechanisms:
coherent rotation and switching in magnetic particles, stochastic
domain wall motion and the Barkhausen effect, coercivity mechanisms
and magnetic viscosity, rate-dependent hysteresis and eddy-current
losses. The book emphasizes the connection between basic physical
ideas and phenomenological models of interest to applications, and,
in particular, to the conceptual path going from Maxwells equations
and thermodynamics to micromagnetics and to Preisach hysteresis
modeling.
Key Features
* The reader will get insight into the importance and role of
hysteresis in magnetism; In particular, he will learn:
* which are the fingerprints of hysteresis in magnetism
* which are the situations in which hysteresis may appear
* how to describe mathematically these situations
* how to apply these descriptions to magnetic materials
* how to interpret and predict magnetic hysteresis phenomena
observed experimentally
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