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IEEE Transactions on Magnetics

Issue 4 • July 1976

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Displaying Results 1 - 23 of 23
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Contributions of rock magnetism and paleomagnetism to recent geophysical advances

    Publication Year: 1976, Page(s):266 - 278
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1888 KB)

    The origin of natural remanent magnetization (NRM) in rocks is discussed both in terms of types and carriers of NRM. The importance of the concept of pseudo-single domain (PSD) grains as carriers of stable remanences is underscored. Recent advances in rock magnetism and paleomagnetism have helped to understand (a) continental motions which took place in the first 4 billion years of the earth's lif... View full abstract»

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  • The invar problem

    Publication Year: 1976, Page(s):278 - 291
    Cited by:  Papers (117)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1776 KB)

    The purpose is to make clear the fundamental physical nature of the Invar problem, disregarding its details. After a brief discussion of the practical applications of the Invar alloys, the large magnetovolume effects and the anomalous magnetic properties are reviewed. The basic ideas of the various interpretations of the Invar effects, as well as the microscopic properties of the Invar alloys, are... View full abstract»

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  • Magnetooptic properties and applications of bismuth substituted iron garnets

    Publication Year: 1976, Page(s):292 - 311
    Cited by:  Papers (122)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2088 KB)

    Using the results of the phenomenological and microscopic description of magnetooptically active transitions presented in the beginning of the article, a review is made of the progress achieved in the understanding of the origin of the large bismuth induced magnetooptic effects in iron garnets. For applications involving the Faraday configuration, optical efficiencies are determined by the ratio o... View full abstract»

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  • Manganese bismuth and other magnetic materials for beam addressable memories

    Publication Year: 1976, Page(s):311 - 327
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2176 KB)

    Properties of materials which have highlighted research and development in the technology of beam accessible magnetic information storage are reviewed. Attention is focused on the advances made in understanding localized thermal magnetization reversal, bit stability and energy thresholds. View full abstract»

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  • Bubble domain memory materials

    Publication Year: 1976, Page(s):327 - 345
    Cited by:  Papers (43)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2112 KB)

    The selection and preparation of bubble domain materials is discussed in the light of materials requirements for bubble domain memories. The history of bubble domain materials development is outlined with emphasis on the discovery and exploitation of two types of materials, magnetic garnets and amorphous magnetic alloys. It is shown how the great compositional flexibility of the garnet system has ... View full abstract»

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  • On spontaneous nucleation in field-accessed bubble devices

    Publication Year: 1976, Page(s):346 - 348
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The dependence ot the in-plane drive field at which bubble domains spontaneously nucleate in field-accessed bubble devices has been investigated as a function of H_{k} - 4\pi M_{s} and of spacer thickness between the bubble film and permalloy propagation elements. The experiments were carried out on amorphous GdCoMo bubble films with T-bar and Y-bar structure... View full abstract»

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  • Changes in recording tape magnetization produced by stress

    Publication Year: 1976, Page(s):348 - 355
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    When mechanical forces are applied to single domain particles that are used in magnetic recording tapes, the resultant stress anisotropy energy alters the magnetized state, producing reversible and irreversible changes. We use four different experimental techniques to measure these changes and analyze the results in terms of the values for the saturation magnetostriction constants (λ... View full abstract»

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  • Magnetic recovery of sulphur from coal in Brasil

    Publication Year: 1976, Page(s):355 - 358
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Magnetic recovery of pyritic sulphur and coal from mine rejects has been envisaged as a two-step sequence of processes. 1) A thermal decomposition of the mixture rich in pyrites at about 700°C which produces a magnetic pyrrhotite and liberates sulphur; 2) air transport of the solid product into a high-gradient magnetic separator to separate coal from the minerals. Analysis is made of results ... View full abstract»

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  • Characterization of magnetic forces by means of suspended particles in paramagnetic solutions

    Publication Year: 1976, Page(s):359 - 368
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    A new technique, whereby the so-called "iso-directional-force lines" may be illustrated directly, is proposed. The method is based on the levitation forces acting on a particle immersed in paramagnetic fluid in nonhomogeneous magnetic field. An ordered set of capillaries, each containing a small particle suspended in the fluid, may be used to depict the iso-directional-force lines by the equilibri... View full abstract»

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  • An investigation of two HSGT magnetic suspension systems (attraction)

    Publication Year: 1976, Page(s):369 - 372
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Two alternate attraction magnetic suspension systems are discussed on a magnetic performance basis, as well as on their lift-to-weight ( L/W ) capabilities. On an equal current basis, the lower reluctance, flat track configuration has higher lift force and better L/W than the U-shaped track configuration with its larger ... View full abstract»

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  • Topological considerations of parametric electromechanical devices and their parametric analysis

    Publication Year: 1976, Page(s):373 - 380
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    One of the methods for attaining free suspension of objects in magnetic fields is magnetic levitation by tuned circuits. Tuned-circuit levitators exhibit typical dynamic instability. However, the inherent tendency of the suspended object to oscillate may serve as a basis for the construction of relatively new types of machines. An attempt is made to treat, all these devices from a generalized poin... View full abstract»

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  • Multimodal operation of a ferroresonant circuit with quintic nonlinearity

    Publication Year: 1976, Page(s):380 - 384
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The multimodal operation (jump phenomenon) of a ferroresonant circuit of practical interest is analyzed using West's method of frequency-damping boundaries with a fifth-order approximation for the saturation curve of the nonlinear inductor. For given circuit parameters, the applied voltage range over which ferroresonance can occur is determined, and it is shown that this method gives more precise ... View full abstract»

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  • An accurate AC demagnetizing method using a linear inductance for high permeability cores

    Publication Year: 1976, Page(s):385 - 389
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    A new simple and accurate ac demagnetizing method for high permeability cores is presented. In this method, a linear inductance is connected in parallel with the winding of the core to stabilize the level of BH minor loops at zero flux level during the whole process of ac demagnetization. The ac demagnetization error is suppressed to less than 0.5% even in 50... View full abstract»

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  • Transfilter

    Publication Year: 1976, Page(s):389 - 392
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The Transfilter is a combination of a leakage-reactance magnetic structure and a capacitor, which is interposed between an ac thyristor voltage controller and the load, to filter the load current, to provide current-source characteristics, and to act as an isolation and impedance-level transformer. The Transfilter was originally developed to provide sinewave adjustable current up to 50 A at 60 Hz ... View full abstract»

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  • A study of magnetic hardening in Pt1-xNixFe

    Publication Year: 1976, Page(s):393 - 395
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Alloys of composition Pt1-xNixFe with ... View full abstract»

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  • Deposition of magnetite films by reactive sputtering of iron

    Publication Year: 1976, Page(s):396 - 400
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    Iron is sputtered reactively in an argon-oxygen glow discharge to form deposits of magnetite. Cycling the oxygen partial pressure between a low and a high value during sputtering causes deposition of alternating layers of Fe-metal and Fe2O3-oxide. Depending on the cycle length, a layered structure results or homogeneous films form. For all films pronounced magnetite peaks wer... View full abstract»

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  • Precession modes and resonance absorption in the canted antiferromagnet FeBO3

    Publication Year: 1976, Page(s):401 - 404
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Dynamic properties of the weak ferromagnet FeBO3were investigated. The dependence of resonance absorption χ" on the angle between the easy plane of magnetizations and the RF field is shown. The calculation of the frequency dependence of the resonant precession modes for the low- and high-frequency branch is presented. Experimental results for the low-frequency branch show good agre... View full abstract»

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  • Ferro-antiferromagnetic transition in the alloy system Fe65(Ni1-xCrx)35at low temperatures

    Publication Year: 1976, Page(s):404 - 406
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The magnetic and electric properties of iron-nickel "invar" alloys and stainless steels are measured at low temperatures. It is shown that "invar" alloys such as stainless steels exhibit one-directional anisotropy, and their electric and galvanomagnetic properties are rather specific. It is shown also that the concentration dependence of Neel temperatures and magnetoresistance for the systems Fe-N... View full abstract»

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  • High-frequency investigations of magnetic noise characteristics

    Publication Year: 1976, Page(s):406 - 410
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Allowing for the magnetic noise damping effect, characteristic changes in the noise spectrum between 1.5-100 kHz are investigated as a function of magnetizing frequency, and corresponding damping-corrected power spectra are outlined. A Systematic comparison is carried out between high-frequency noise characteristics and properties of a low-alloy steel sheet quality, the dependence found being more... View full abstract»

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  • Block oriented bubble domain memory organization

    Publication Year: 1976, Page(s):411 - 413
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A block oriented bubble domain memory organization is proposed which provides a block access time improvement over existing major/minor loop designs and which exhibits built-in redundancy. Wafer level integration is utilized to reduce the module lead count. View full abstract»

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  • [Back cover]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Magnetooptical investigation of the permalloy overlay at micron resolution

    Publication Year: 1976, Page(s):413 - 415
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    The distribution of magnetization M in T and I elements at various orientations and values of external magnetic field H was investigated. It has been discovered that there is a strong mutual influence of adjacent bars on the distribution of M in T- and I-bars. Direct observations of the m... 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