IEEE Transactions on Magnetics

Issue 4 • July 1987

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Displaying Results 1 - 12 of 12
  • [Front cover and table of contents]

    Publication Year: 1987, Page(s): 0
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  • Study of the local structure of metastable crystalline iron-boron alloys

    Publication Year: 1987, Page(s):1937 - 1944
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1147 KB)

    The microstructure of metastable crystalline Fe100-xBx( ) alloys, produced by rapidly quenching from the melt, has been studied with different techniques. Studies performed with Möss-bauer effect (ME) spectroscopy and nuclear magnetic resonance (NMR) are reported here, along with preliminary high resolution electron ... View full abstract»

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  • Effects of the heat treatment on the microstructures and magnetic properties in Alnico 5

    Publication Year: 1987, Page(s):1952 - 1955
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (614 KB)

    In Alnico 5, cooling rate c in a magnetic field from 900°C to 600°C and optimum aging time t at 600°C have the relation of log(t) = 0.417 log (c) + 0.884. However the final magnetic properties are highly dependent on the cooling rate. Spinodally decomposed structures of this alloy show that the faster the cooling rate the smaller the size of the FeCo-rich precipitates and... View full abstract»

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  • A study of coercivity in Ca-Ge substituted epitaxial garnets

    Publication Year: 1987, Page(s):1945 - 1951
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1032 KB)

    This paper is an analysis of two models on the origin of coercivity in certain crystals. The first model, based upon the work of Kersten. suggested that coercivity in soft magnetic materials is due to the variation in domain wall energy throughout the crystal. The second model attributes coercivity to magnetostatic interactions between domain walls and crystal defects. Recent work on calcium and g... View full abstract»

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  • An analytical investigation on the efficiency of a magnetic frequency tripler with series-connected reactors

    Publication Year: 1987, Page(s):1956 - 1963
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (648 KB)

    A numerical analysis of a magnetic frequency tripler with series-connected reactors and the maximum efficiency under the optimum setting of core dimensions is described. The steady-state values of voltage, current, power, efficiency, and power factor are calculated by using the numerical method where the φ-i characteristics of saturable reactor are approximated by a fifth-order polynomial as ... View full abstract»

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  • The study of transient current distributions in the conductor of a reactor with laminated core

    Publication Year: 1987, Page(s):1964 - 1971
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (632 KB)

    In this paper, a finite-difference method is used for solving transient electromagnetic field distributions in the conductor of a reactor with laminated core of nonlinear magnetic property. In the analysis, the reactor is divided into iron, air, and copper regions. With the aid of B-μ table and material indexes, both the time-dependent current distribution in the conductor and the vector pote... View full abstract»

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  • The variational treatment of the diffusion equation for vector field problems

    Publication Year: 1987, Page(s):1972 - 1977
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (584 KB)

    A new and efficient technique for the solution of axisymmetric vector potential problems described by the diffusion equation is reported. The equation is solved using the finite element method, and the corresponding element matrices are derived and extensively tested computationally. The numerical results obtained for a simple structure are compared with the exact analytical solution. A difficult ... View full abstract»

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  • Three-dimensional field computation of charged sectors: A semianalytical method

    Publication Year: 1987, Page(s):1978 - 1984
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (520 KB)

    An analytical representation of the potential created by charged sectors of a ring has been investigated. The surface charge density of the ring is supposed to be constant along a radius, assuming that a Fourier series development allows simplification into a linear superposition of sinusoidal surface densities. In addition to the obvious electrostatic devices, this approach also applies-because o... View full abstract»

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  • High coercivity sputter-deposited maghemite thin-film disk

    Publication Year: 1987, Page(s):1985 - 1994
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1568 KB)

    The fabrication and read-write characteristics of a high-coercivity sputter-deposited maghemite (γ-Fe2O3) thin-film disk medium is discussed. By employing a low sputtering gas pressure, severe internal strain is introduced into the films. This internal strain markedly increases coercivity. Furthermore, the films are composed of fine crystallites (300-400 Å in diamet... View full abstract»

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  • Reciprocity principles for magnetic recording theory

    Publication Year: 1987, Page(s):1995 - 2002
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (752 KB)

    A generalized reciprocity principle for the theory of magnetic reproduction is rigorously derived from first principles. Flux contributions from head nonlinearities, self-inductance, eddy currents, and radiation are naturally included. Approximations necessary to reduce the general result to several practical forms are clearly demonstrated. An energy interpretation of reciprocity formulas is also ... View full abstract»

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  • [Back cover]

    Publication Year: 1987, Page(s): 0
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    Freely Available from IEEE
  • On damped gyromagnetic precession

    Publication Year: 1987, Page(s):2003 - 2004
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (184 KB)

    The relationship between the two damped gyromagnetic equations in current use is discussed in a novel way. As was concluded thirty years ago, the underlying physics is different even though the equations can be cast with the same mathematical form. View full abstract»

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Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

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Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology