Journal ArticleDOI
Magnetization reversal in permalloy particles: Micromagnetic computations
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TLDR
Magnetization distributions in a rectangular permalloy particle with an 8:1 aspect ratio are presented in this article, where a magnetic field is applied along the easy axis of the particle, there is considerable change in the vortex pattern as the applied field varies, but the moment is nearly constant.Abstract:
Magnetization distributions in a rectangular permalloy particle with an 8:1 aspect ratio are presented. When a magnetic field is applied along the easy axis of the particle, there is considerable change in the vortex pattern as the applied field varies, but the moment is nearly constant. Magnetization reversal is sudden. When a field is applied oblique to the easy axis the magnetization is rather uniform in most of the particle. When an in‐plane field is applied exactly along the hard axis, a complex domain structure is formed, so that the remanence is zero, in agreement with experiment. Formation of this state requires that the applied field exceed a critical value. Upon application of an easy axis field to this complex state, the domain structure is shifted so that the magnetization increases linearly with the applied field.read more
Citations
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Ordered magnetic nanostructures: fabrication and properties
TL;DR: The fabrication methods and physical properties of ordered magnetic nanostructures with dimensions on the submicron to nanometer scale are reviewed in this article, where various types of nanofabrication techniques are described, and their capabilities and limitations in achieving magnetic nano-structures are discussed.
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Patterned Magnetic Recording Media
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Patterned media: a viable route to 50 Gbit/in/sup 2/ and up for magnetic recording?
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Nanoscale Magnetic Domains in Mesoscopic Magnets
Michel Hehn,K. Ounadjela,Jean-Pierre Bucher,F. Rousseaux,Dominique Decanini,Bernard Bartenlian,Claude Chappert +6 more
TL;DR: High-resolution magnetic force microscopy studies of magnetic submicrometer-sized cobalt dots with geometrical dimensions comparable to the width of magnetic domains reveal a variety of intricate domain patterns controlled by the details of the dot geometry.
References
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Journal ArticleDOI
A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys
Edmund C. Stoner,E. P. Wohlfarth +1 more
TL;DR: In this paper, the effect of shape anisotropy on magnetization curves was studied for the case of ellipsoidal spheroids of revolution (e.g., ellipses of revolution).
Journal ArticleDOI
Domain Walls in Thin Ni–Fe Films
TL;DR: In this paper, the energies of Bloch and Neel walls are calculated as functions of the film thickness and the angle through which the magnetization turns in the wall, and it appears that in addition to the well-known Bloch-Neel wall transition as a function of film thickness, cross tie Neel wall transitions occur when the angle of the magnetisation rotation is changed by an external field.
Journal ArticleDOI
Ab initio micromagnetic calculations for particles (invited)
D. R. Fredkin,T. R. Koehler +1 more
TL;DR: In this paper, the results of first principles calculations of the magnetic behavior of particles of varying shapes (sphere, prolate spheroid, and rectangular particles of various aspect ratios) and sizes ranging from ≊0.1 to 10 μm were presented.