Book ChapterDOI
Zur Theorie des Austauschproblems und der Remanenzerscheinung der Ferromagnetika
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TLDR
The Slatersche Methode as mentioned in this paper is an analog zur Jordan-Kleinschen Theorie in eine nichtlineare Wellengleichung im dreidimensionalen Raum, wobei das Absolutquadrat der Wellenfunktion anschaulich als Spindichte gedeutet werden kann.Abstract:
Die Slatersche Methode zur Behandlung der Austauschaufspaltung und Termsystemeinteilung beim Mehrkorperproblem wird analog zur Jordan-Kleinschen Theorie umgeformt in eine nichtlineare Wellengleichung im dreidimensionalen Raum, wobei das Absolutquadrat der Wellenfunktion anschaulich als „Spindichte“ gedeutet werden kann (§ 1 und 2). Vernachlassigt man den q-Zahlcharakter der Wellenfunktion, so stellt die Wellengleichung analog zur Hartreeschen Methode eine klassisch-anschauliche Annaherungsgleichung fur das Verhalten der Spindichte dar, die zur Diskussion der Remanenz- und Hysteresiserscheinungen verwendet wird (§ 4 und 5). Ferner wird im Anschlus an das statistische Problem ein Zusammenhang zwischen den Wahrscheinlichkeiten der verschiedenen Konfigurationen eines Systems bei einer bestimmten Temperatur und den Kennardschen Transformationsfunktionen aufgestellt (§ 3).read more
Citations
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Journal ArticleDOI
Free Energy of a Nonuniform System. I. Interfacial Free Energy
John W. Cahn,John E. Hilliard +1 more
TL;DR: In this article, it was shown that the thickness of the interface increases with increasing temperature and becomes infinite at the critical temperature Tc, and that at a temperature T just below Tc the interfacial free energy σ is proportional to (T c −T) 3 2.
Journal ArticleDOI
Coherent and incoherent states of the radiation field
TL;DR: In this article, the photon statistics of arbitrary fields in fully quantum-mechanical terms are discussed, and a general method of representing the density operator for the field is discussed as well as a simple formulation of a superposition law for photon fields.
Journal ArticleDOI
Distribution functions in physics: Fundamentals
Mark Hillery,Mark Hillery,R. F. O'Connell,Marlan O. Scully,Marlan O. Scully,Eugene P. Wigner +5 more
TL;DR: In this article, a two-part review of distribution functions in physics is presented, the first part dealing with fundamentals and the second part with applications, focusing on the so-called P distribution and generalized P distribution.
Journal ArticleDOI
A phenomenological theory of damping in ferromagnetic materials
TL;DR: In this paper, a reformulation of the phenomenological theory of the magnetization field was proposed to take large non-eddy-current damping into account in thin Permalloy sheets.
Book ChapterDOI
On the theory of the dispersion of magnetic permeability in ferromagnetic bodies
TL;DR: This chapter examines the distribution of magnetic moments in a ferromagnetic crystal and finds that if the crystal is placed in an external magnetic field, the boundaries between the layers begin to move so that the layers with magnetic moments parallel to the field become wider.
References
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Journal ArticleDOI
The Quantum Theory of the Emission and Absorption of Radiation
TL;DR: In this article, it was shown that it is possible to build up a fairly satisfactory theory of the emission of radiation and of the reaction of the radiation field on the emitting system on the basis of a kinematics and dynamics which are not strictly relativistic.
Journal ArticleDOI
Quantum Mechanics of Many-Electron Systems
TL;DR: In this article, it was shown that there were large forces coupling the spin vectors of the electrons in an atom, much larger forces than could be accounted for as due to the interaction of the magnetic moments of the electron.
Journal ArticleDOI
Zur Quantenmechanik einfacher Bewegungstypen
TL;DR: In this article, a quantenmechanische Losung einfacher Bewegungstypen (Elektron im homogenen elektrischen bzw. magnetischen Felde, Oszillator) nach der Dirac- Jordan-Heisenbergschen Methode gegeben.
Journal ArticleDOI
The Theory of Complex Spectra
TL;DR: In this article, the authors derived Hund's scheme for multiplet classification directly from theory and compared it with the results obtained experimentally in some typical examples, and found that the present theory leads to the same results as the rule when it is obeyed experimentally, but many cases which were exceptions to that rule are in agreement with the theory.
Journal ArticleDOI
Zum Mehrkörperproblem der Quantentheorie
Pascual Jordan,Oskar Klein +1 more
TL;DR: In this paper, the symmetrische Losung der Wellengleichung im Koordinatenraum is considered, in which anzahl elektrischer Teilchen unter Berucksichtigung ihrer Wechselwirkung durch aQuantelung der de Brogliewellen im dreidimensionalen Raum dargestellt.