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IEEE Transactions on Magnetics

Issue 4 • December 1972

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

    Publication Year: 1972, Page(s): 0
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    Freely Available from IEEE
  • A transient solution for domain wall motion

    Publication Year: 1972, Page(s):741 - 743
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Approximate analytic solutions of transient wall motion in a bulk ferromagnetic material are obtained from the dynamic torque equations with a Gilbert damping term. These transient solutions reduce to previously obtained well-known solutions under steady-state velocity conditions. View full abstract»

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  • Wall contraction in Bloch wall films

    Publication Year: 1972, Page(s):743 - 746
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The phenomenon of wall contraction characterized by a peak in the velocity-field relationship and a region of negative differential mobility is observed in uniaxial magnetic thin films of various magnetic properties by careful interrupted-pulse experiments. The observed results agree quite well with the theory for bulk samples when the extensive flux closure of thin film walls is accounted for by ... View full abstract»

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  • The effects of spacing between garnet film and Permalloy overlay circuit in magnetic bubble devices

    Publication Year: 1972, Page(s):754 - 758
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (479 KB)

    An experimental test set for magnetic bubble devices has been constructed in which the spacing between the garnet film and the Permalloy overlay is variable. The experimental uncertainty in spacing is approximatelypm.15mum, and spacings as small as.5mum have been attained. Bias margin data are presented which were taken at 1 Hz on a 20 micron period chevron circuit as a funct... View full abstract»

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  • Cylindrical-domain propagation by Permalloy bar stray fields

    Publication Year: 1972, Page(s):746 - 753
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    The field gradients of magnetic stray fields which affect the propagation of cylindrical domains in a T-bar pattern are investigated. The magnetization of the Permalloy bars which gives rise to the propagating field gradient is found to be influenced by the stray field of the cylindrical domain itself. Considering this interaction, the propagating field gradients are calculated first for single ba... View full abstract»

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  • Magnetic materials for integrated cores

    Publication Year: 1972, Page(s):759 - 764
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (621 KB)

    Magnetic materials for an integrated magnetic core memory have been developed. The materials are for a storage layer about 1 μm thick and a low reluctance keeper layer. Materials investigated were Co-Ni-Fe for the storage layer and Cr-Ni-Fe for the keeper. Measurements were made ofH_{c}, B_{s}, B_{r}, lambda_{s}, S_{w}, H_{0}, and Hdisturb. Layer stress and adhesion were... View full abstract»

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  • Influence of extreme dilutions on the magnetic properties of single-domain particle aggregates

    Publication Year: 1972, Page(s):770 - 772
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB)

    Various magnetic properties of samples of single-domain particles dispersed in a nonmagnetic matrix are examined as functions of the packing fractionp. The range of variability ofpis from 0.0003 to 0.20. The squareness ratio and the rotational and alternating hysteresis integrals change withp, while the coercive field, the initial anhysteretic susceptibility, and t... View full abstract»

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  • Memory-core characteristics of cobalt substituted lithium ferrite

    Publication Year: 1972, Page(s):765 - 769
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The memory-core characteristics of compositions in the system Li0.47-1/2x-1/2yCoxZnyNi0.06Fe2.47-1/2x-1/2yO4have been studied. The cobalt and zinc contents have been varied from zero to 0.02 and from zero to 0.12, respectively. It is demonstrated that small amounts of cobalt decrease the temperature coefficient of the coercive force... View full abstract»

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  • Investigation of the inverted state of nuclear magnetic levels in Co59films

    Publication Year: 1972, Page(s):773 - 774
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (214 KB)

    Experiments that yield inversion of the Co59thin film nuclear system were carried out. For nanosecond magnetization reversal by a field with a growth rate greater than5 cdot 10^{11}Oe/s, 85% inversion was obtained. The investigation of the inverted state at frequencies corresponding to hexagonal (α) and f.c.c. (β) phases revealed that Co59-β switches... View full abstract»

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  • Transient eddy currents in thin metal sheets

    Publication Year: 1972, Page(s):775 - 779
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    In the present paper, an approach is outlined to the solution of the transient eddy currents produced upon field switching in a thin nonmagnetic metal layer. The results may be used in evaluating the distribution of the transient volume force densities acting on the metal. Some of the fields in which problems of this kind arise are power equipment shielding, nondestructive eddy current test instru... View full abstract»

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  • The magnetic mixing amplifier

    Publication Year: 1972, Page(s):780 - 785
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    A new type of magnetic signal mixing amplifier is introduced which is useful for the treatment of multisignals biased with different levels of potential. A saturable core and transistors are its basic components. This mixing amplifier is excellent in linearity, has push-pull with an inherently single core, has a quick response, and is operated with a dc source. Decoupling of the input and output i... View full abstract»

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  • Power loss and flux density distributions in the T-joint of a three phase transformer core

    Publication Year: 1972, Page(s):785 - 790
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A three phase transformer test facility has been used for measuring the localized power loss and flux distribution within the core. The flux and loss distributions in the T-joint of a core with simple double overlap joints have been investigated. The flux density distribution was measured by an array of search coils wound on individual laminations, and the localized power loss was found by measuri... View full abstract»

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  • The theoretical output of a ring core fluxgate sensor

    Publication Year: 1972, Page(s):791 - 796
    Cited by:  Papers (19)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    This article proves that the output from a ring core sensor is directly proportional to the first time derivative of the product of dynamic permeability and magnetic intensity perturbation within the core caused by an external, uniform magnetic field. (Dynamic permeability is defined to be the slope of the hysteresis loop at a given point in time.) Assuming that ellipsoidal shells can approximate ... View full abstract»

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  • Comments on "Sensor noise in low-level flux-gate magnetometers

    Publication Year: 1972, Page(s):797 - 798
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB)

    First Page of the Article
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  • Correction to "Neutron-diffraction determination of magnetic structures"

    Publication Year: 1972, Page(s): 798
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (91 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1972, 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.

Full Aims & Scope

Meet Our Editors

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