Micromagnetics

The micromagnetic structure is directly related to the microstructure and chemical inhomogenities in the layer. The materials used and the deposition technology as well as the parameters play an important role. Thin-film growth, nudeation processes in relation to the deposition parameters, are very important for understanding the thin film microstructure. The relationships between sfd and recording properties are not necessarily valid for media with perpendicular anisotropy as the demagnetizing field can be more important than sfd. 

When one electron is assigned to an orbital in an atom, the electron can spin in either direction. In a magnetic field, this electron acts as a micromagnet and aligns with the magnetic field. An element with an unpaired electron is usually magnetic. 

II. General Framework The Micromagnetic Fokker-Planck Equation... 

II. GENERAL FRAMEWORK THE MICROMAGNETIC FOKKER-PLANCK EQUATION... 

Since the very first studies of fine-particle systems [14], the development of the micromagnetic science was inspired mainly by the necessity to predict the magnetic properties and response of a ferromagnetic particulate media. Beyond argument, in this objective the fundamental and applicational aspects are tied up very closely, if not inseparably. 

This section is based mostly on the results presented in Ref. 78 and is arranged in the following way. In Section III.B.l we note mentioned the problem of superparamagnetic relaxation, which has been already tackled by means of the Kramers method, in the in Section II.A), and show how to obtain the analytical solution (in the form of asymptotic series) for the micromagnetic Fokker-Planck equation in the uniaxial case. In Section III.B.l the perturbative... 

Brown [47] shaped up those semiqualitative considerations into a rigorous Sturm-Liouville eigenvalue problem by deriving the micromagnetic kinetic equation... 

This chapter investigates how intrinsic and extrinsic properties are affected by nanostructuring. Emphasis is on model calculations and analytical approximations, as contrasted to Chapter 2 by Kashyap et al. which focuses on numerical calculations, and Ch. 4 by Schrefl et al., where emphasis is on micromagnetic models and simulations. Section 2 is devoted to static properties, whereas section 3 is concerned with magnetization dynamics. Finally, section 4 presents a number of case studies. 

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