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IEEE Transactions on Magnetics

Issue 3 • Date May 1976

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Displaying Results 1 - 16 of 16
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Bubble domain field access device modeling part I: The magnetization problem

    Publication Year: 1976, Page(s):137 - 147
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    A continuum magnetostatic energy model for describing field access bubble domain devices is introduced and a prescription for solving the modeling problem is given. Minimization of the magnetostatic energy yields an integral equation defining the magnetization in the permalloy and the solution of this magnetization problem is described in detail. Application of the formalism to the calculation of ... View full abstract»

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  • Bubble domain field access device modeling part II: Device modeling

    Publication Year: 1976, Page(s):148 - 159
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1416 KB)

    By generalizing the stability treatment of Thiele to include the presence of a permalloy pattern, a magnetostatic energy model for describing field access devices is derived. The general implications of the model with regard to minimum drive fields and propagation margins are discussed and calculated magnetostatic energy profiles for noninteracting chevrons are presented. The question of when the ... View full abstract»

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  • An analytical design theory for field-access bubble domain devices

    Publication Year: 1976, Page(s):160 - 202
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4472 KB)

    This paper describes the derivation and applications of an analytical model for magnetic bubble domain propagation. A fleld-access bubble device is treated as a magnetic circuit, emphasizing fluxes rather than fields as in most previous treatments. The energy changes are calculated within the bubble domain rather than in the propagation pattern, making possible a simple analytical-graphical proces... View full abstract»

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  • Dynamics of bubbles in field access devices studied using a high speed optical sampling microscope

    Publication Year: 1976, Page(s):202 - 208
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    Dynamics of bubbles in field access devices operated at 100 kHz and 200 kHz have been studied using a high speed optical sampling microscope capable of making a 10 nsec single exposure photograph at a known sampling time with respect to a rotating field orientation. By scanning the sampling time through one rotating field cycle, a series of time-sequenced transient domain configurations of bubbles... View full abstract»

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  • Permalloy disk replicator for amorphous film 2 µm bubble devices

    Publication Year: 1976, Page(s):209 - 211
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A permalloy disk replicator in an amorphous film 2 μm bubble device has been Studied for different geometrical dimensions, and from quasi-static to 200 kHz operating frequency. Distinct regions of the margin plot are observed, and their dependence on geometry is analyzed. It is found that for reliable replication over a wide margin range, the poles from the replicator disk, from the neighbori... View full abstract»

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  • Bubble lattice formation in thick MnBi platelet by one-point nucleation

    Publication Year: 1976, Page(s):212 - 217
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    The dynamic domain formations in a single crystal MnBi platelet were examined under various external field strengths. Once the reverse domain is nucleated at one point of the saturated plate by pricking or external pulse field, the domain expands with various modes depending on the net field strength acting on the moving wall and forms various patterns. In a thick platelet, a bubble lattice is pro... View full abstract»

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  • Effect of nonzero write field rise time in digital magnetic recording

    Publication Year: 1976, Page(s):218 - 223
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    A general method is given to predict write field rise time effects on isolated pulses in digital magnetic recording. The method is based on the use of a graph, which can be calculated once and for all, from which the position and the form of a transition, written under several conditions, can be derived. Emphasis is laid on pulse shift effects, and it is shown that the results obtained give good e... View full abstract»

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  • Theoretical study of vector magnetization distribution using rotational magnetization model

    Publication Year: 1976, Page(s):224 - 229
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    In magnetic recording, the recording fields are essentially vectorial, and the magnetization process in the recording medium has to be analyzed using vector magnetization. From this fact, a vector magnetization distribution in the recording medium must be evaluated by both magnitude and direction of magnetization. This paper describes the vector magnetization distributions obtained by a new method... View full abstract»

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  • Recording head design calculations

    Publication Year: 1976, Page(s):230 - 233
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Factors affecting the design and performance of digital recording heads are discussed with reference to multitrack write/read heads for use with thin high-coercivity disc media. Account is taken of the flux leakage paths round each ferrite core to calculate the core efficiency and crosstalk from an adjacent core. The efficiency for a core with permeability = 1000 is about 20% less than obtained by... View full abstract»

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  • Traction force on paramagnetic particles in magnetic separators

    Publication Year: 1976, Page(s):234 - 235
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The magnetic force, which attracts paramagnetic particles towards a magnetized ferromagnetic wire, is calculated for the geometry which is most likely to be used for magnetic separation. It is demonstrated that the magnetic field problem has an analytic solution, from which the maximum force is obtained analytically as a very simple expression. The choice of optimum wire diameter becomes less crit... View full abstract»

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  • Observations on the influence of processing steps on the magnetic hysteresis parameters of a Co/Fe/Nb alloy

    Publication Year: 1976, Page(s):236 - 243
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1480 KB)

    Data available on the magnetic hysteresis parameters of a Co/Fe/Nb alloy (Nibcolloy) reveal several discrepancies. To resolve these inconsistencies, an experimental program involving variations in annealing treatments and magnetic properties, mechanical properties, and microstructural characterization was carried out. Results indicate that the use of an anneal on hard drawn wire to mechanically so... View full abstract»

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  • Influence of compressive stress on magnetic properties of a

    Publication Year: 1976, Page(s):244 - 248
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (695 KB)

    Demagnetized domain structures were viewed by Kerr effect and 60 Hz magnetic properties were characterized as a function of compressive stress, σc, parallel to the [001] direction for a View full abstract»

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  • Ruckling: A novel low-loss domain wall motion for

    Publication Year: 1976, Page(s):248 - 255
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (857 KB)

    180° domain walls in View full abstract»

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  • Highly sensitive procedures for measuring permeabilities (µ±) for circularly polarized fields in microwave ferrites

    Publication Year: 1976, Page(s):256 - 259
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A highly sensitive method for measuring μ'±- jμ''±of ferrites far from the ferrimagnetic resonance region is proposed which makes use of the resonance splitting of counter-rotating TE11modes in the cylindrical metallic cavity resonator Filled with axially biased ferrite specimen. With a Filling factor of unity, both the frequency splitting and t... View full abstract»

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  • [Back cover]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE

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