Journal ArticleDOI
Nucleation Fields in Periodic Multilayers
S. Nieber,Helmut Kronmüller +1 more
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TLDR
Based on the Kronig-Penney model of quantum mechanics, the nucleation field for a periodic multilayer composed of two alternating layers with different crystalline anisotropies is determined in this article.Abstract:
The linearized micromagnetic equation for inhomogeneous nucleation in planar soft magnetic regions is derived and interpreted as a one-dimensional Schrodinger equation. Based on the Kronig-Penney model of quantum mechanics, the nucleation field for a periodic multilayer composed of two alternating layers with different crystalline anisotropies is determined.
Die linearisierte mikromagnetische Gleichung fur die inhomogene Keimbildung in ebenen weichmagnetischen Bereichen wird abgeleitet, und es wird gezeigt, das diese der eindimensionalen Schrodingergleichung entspricht. Ausgehend vom Kronig-Penney-Modell der Quantenmechanik wird das Keimbildungsfeld einer periodischen Vielfachschicht, die aus zwei alternierenden Schichten mit verschiedenen Kristallanisotropien zusammengesetzt ist, berechnet.read more
Citations
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Two- and three-dimensional calculation of remanence enhancement of rare-earth based composite magnets (invited)
TL;DR: The magnetic properties of isotropic rare-earth-based composite magnet are investigated in this article, where it is shown that exchange interactions between the phases suppress the nucleation of reversed domains and thus preserve a high coercive field.
Journal ArticleDOI
Exchange hardening in nano-structured two-phase permanent magnets
TL;DR: The coercive field of a magnetically soft prismatic grain of irregular cross-section embedded in a hard magnetic matrix has been calculated as a function of the size of the soft magnetic grain this paper.
Journal ArticleDOI
Predicting the Future of Permanent-Magnet Materials
TL;DR: In this paper, an analysis of aligned hard-soft nanostructures shows that soft-in-hard geometries are better than hard-insoft geometry and that embedded soft spheres are better compared to sandwiched soft layers.
Journal ArticleDOI
Aligned two‐phase magnets: Permanent magnetism of the future? (invited)
TL;DR: In this article, the coercivity and energy products of a magnet consisting of an aligned hard-magnetic skeleton phase and a soft magnet phase with high saturation magnetization were investigated, and the energy product in suitable nanostructured Sm2Fe17N3/Fe65Co35 composites was predicted to be as high as 1090 kJ/m3.
References
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Book
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.
Journal ArticleDOI
Über die Quantenmechanik der Elektronen in Kristallgittern
TL;DR: In this article, the Bewegung eines Elektrons im Gitter wird untersucht, indem wir uns dieses durch ein zunachst streng dreifach periodisches Kraftfeld schematisieren.
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Zur Quantentheorie des Atomkernes
TL;DR: In this paper, die Prozesse der α-Ausstrahlung auf Grund der Wellenmechanik naher zu untersuchen und den experimentell festgestellten Znsammenhang zwischen Zerfallskonstante und Energie der αPartikel theoretisch zu erhalten.
Journal ArticleDOI
Quantum Mechanics of Electrons in Crystal Lattices
TL;DR: In this article, the authors investigated the physics of electrons in periodic fields of potential, where the interaction of a given electron with other particles of the lattice may be replaced in first approximation by a periodic field of potential.