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IEEE Transactions on Magnetics

Issue 4 • Date July 1985

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Displaying Results 1 - 11 of 11
  • [Front cover and table of contents]

    Publication Year: 1985, Page(s): 0
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    Freely Available from IEEE
  • Simulated annealing: An application in fine particle magnetism

    Publication Year: 1985, Page(s):1277 - 1282
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    Using a model of a system of interacting fine ferromagnetic particles, a computer simulation of the dynamical approach to local or global minima of the system is developed for two different schedules of the application of ac and dc magnetic fields. The process of optimization, i.e., the achievement of a global minimum, depends on the rate of reduction of the ac field and on the symmetry of the ac ... View full abstract»

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  • An improved measurement of the absolute efficiency of magnetic heads by saturating the gap field

    Publication Year: 1985, Page(s):1283 - 1288
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A method that can be used to measure the absolute efficiency of narrow-track magnetic heads such as video heads (gap area <103(μm)2) is described. The method is based on the detection of the gap flux by means of a subsidiary coil wound around the gap. Usually a considerable amount of leakage flux is detected together with the gap flux, which obviously would impair the... View full abstract»

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  • Characteristics of ideal probe heads with ideal windings in the presence of a permeable media underlayer

    Publication Year: 1985, Page(s):1289 - 1294
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    An analytical expression has been derived for the field of a two-dimensional infinitesimally thin probe head with the winding located at a finite distance from the probe tip. The results of the calculations presented illustrate the effect of the location of the winding on the fields of head models and their aperture functions. View full abstract»

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  • Temperature dependence of the effective permeability of heat treated Sendust alloys

    Publication Year: 1985, Page(s):1295 - 1300
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    The temperature dependence (-10°C-70°C) of the effective permeability (μeff) of Sendust alloys (Fe-9-10 wt% Si-5-7 wt% Al) quenched at a room temperature from the various temperatures (400°C-700°C) was investigated at every 2°C in the temperature range of -10°C to 70°C. Most of the studied alloys gave a peak of μeffin the studied t... View full abstract»

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  • Annealing kinetics of thin permalloy films

    Publication Year: 1985, Page(s):1301 - 1305
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Low-temperature (250-397°C) annealing was found to cause a large decrease in the resistivity of radio-frequency sputter-deposited thin (≤ 500 Å) Permalloy films. A transmission electron microscope was used to investigate a probable microstructural change occurring during the annealing. It was found that the low-temperature annealing induced considerable grain growth in these films.... View full abstract»

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  • Magnetic properties in the system Iron-Cobalt-Aluminum

    Publication Year: 1985, Page(s):1306 - 1309
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The ternary alloy system Fe-Co-Al is studied in the body-centered cubic (bcc) phase for the composition dependence of room temperature magnetization, saturation induction, and Curie temperature Tc. The system has potential for high temperature application as soft magnetic material. The results expand upon earlier measurements. The presence of a broad maximum in magnetization near the co... View full abstract»

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  • Analysis of tubular linear induction motors, using the concept of surface impedance

    Publication Year: 1985, Page(s):1310 - 1313
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    By using the surface-impedance method, equivalent circuit for an axial-flux tubular induction motor is obtained. This circuit is used to determine the performance characteristics of a laboratory model. The calculated results are compared with experimental results. The voltages and currents in the equivalent circuit are related directly to the field quantities within the actual device. View full abstract»

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  • The effect of stress on the magnetization of mild steel at moderate field strengths

    Publication Year: 1985, Page(s):1314 - 1320
    Cited by:  Papers (40)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Measurements are presented of the magnetization of mild steel, at field strengths between 100 A/m and 1200 A/m, for hysteretic and anhysteretic conditions. Magnetization was parallel or perpendicular to an applied uniaxial stress. The experimental results showed that tension parallel to the field or compression perpendicular to the field had relatively little effect on the flux density, but parall... View full abstract»

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  • [Back cover]

    Publication Year: 1985, Page(s): 0
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    Freely Available from IEEE
  • "Iron-Deficient" YIG?

    Publication Year: 1985, Page(s): 1321
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    In a recent letter to this TRANSACTIONS [1], Guyot, Cagan, and Merceron claim to have measured the initial permeabilities, at different constant temperatures, as a function of frequency, of "iron-deficient" yttrium iron garnet (YIG). They attribute the nature of their results to the presence of Fe4+ions in their samples, which provide a means of valency interaction. The method of prepar... 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