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IEEE Transactions on Magnetics

Issue 1 • March 1965

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Displaying Results 1 - 19 of 19
  • [Front cover and table of contents]

    Publication Year: 1965, Page(s): 0
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  • Frontispiece

    Publication Year: 1965, Page(s): 2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    First Page of the Article
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  • Message from the chairman

    Publication Year: 1965, Page(s):3 - 4
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  • Administrative committee

    Publication Year: 1965, Page(s):5 - 9
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  • A coupling phenomenon between the magnetization of two ferromagnetic thin films separated by a thin metallic film--Application to magnetic memories

    Publication Year: 1965, Page(s):10 - 12
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A new type of magnetic interaction between two ferromagnetic thin films separated by a third metallic nonmagnetic thin film is studied. This coupling tends to bring the magnetization of the ferromagnetic materials into parallel alignment. The coupling is shown to be dependent upon the intermediate material and its thickness, and on the nature of the ferromagnetic media present. These interactions ... View full abstract»

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  • Woven thin-film wire memories

    Publication Year: 1965, Page(s):13 - 17
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Extraordinary advances in electronic computers can be expected with the development of newer types of quick-access memories. Much research is being carried out, at present, on the use of magnetic thin-films for magnetic memories. Since many elements must be employed, it is desirable that each bit be absolutely reliable, simple, inexpensive, and suitable for mass production. Through basic experimen... View full abstract»

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  • A high-speed card changeable permanent magnet memory--The inverted twistor

    Publication Year: 1965, Page(s):18 - 21
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    A high-speed card changeable permanent magnet twistor memory is described. High switching speeds at low drive current levels are obtained by inverting the twistor (using the twistor wire as the word line rather than the sense line as in previous designs). A 512-word, 24-bit memory having a cycle time capability of 250 ns has been constructed and evaluated. Bipolar drive currents of 600 mA produced... View full abstract»

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  • System and fabrication techniques for a solid-state random-access mass memory

    Publication Year: 1965, Page(s):21 - 25
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This paper describes a development program aimed at improving processing speeds by providing data processing systems with random-access memories approaching the speed of ferrite-core matrix memories, but at a cost that economically permits of mass-memory capacities. Compatible system and fabrication techniques were devised to reach the low cost objective. The paper details the system and fabricati... View full abstract»

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  • Magnetic film phase-locked oscillator

    Publication Year: 1965, Page(s):26 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The Phase-Locked Oscillator (PLO), also known as a parametron, was proposed almost simultaneously in 1954 by Von Neuman and Goto as a digital device [1], [2]. Since that time, much developmental of effort has been placed on parametrons utilizing ferrite cores and magnetic films. A comprehensive presentation of the use and application of the PLO can be found in the technical literature [3]-[8]. Thi... View full abstract»

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  • Two-phase, all-magnetic shift registers that can be operated with a single pulse driver in the 0 to 5 KC range

    Publication Year: 1965, Page(s):31 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    Two-phase, all-magnetic shift registers have been designed and operated using either two pulse drivers or a single pulse driver and a dc source. The theory of operation of a one-core-per-bit register and a two-core-per-bit register is presented. Experimental information is given that demonstrates the significant operating characteristics of the circuits. View full abstract»

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  • Silicon gate-controlled AC switch and its applications

    Publication Year: 1965, Page(s):36 - 42
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A new silicon switch, called Triac, having three terminals and able to control alternating current, is described. It is an avalanche device controlling load current flow in both directions in response to a gate signal. Some of the properties of the Triac are described, and circuits such as on-off and gradual controls are shown for its control. Applications for the Triac include the control of elec... View full abstract»

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  • High-frequency time-ratio control with insulated and isolated inputs

    Publication Year: 1965, Page(s):43 - 48
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Fast-responding amplifiers are needed in many industrial and defense systems. Systems using power amplifiers with one to 1000 watts of output dc power require high performance. The requirements often include high efficiency, light weight, compactness, high reliability, economy, and simplicity, along with fast response and insulated multiple inputs. These performances are required in applications s... View full abstract»

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  • Stabilized 400 to 3600 c/s magnetic frequency multiplier

    Publication Year: 1965, Page(s):49 - 53
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    This paper presents detailed design information and performance characteristics of a stabilized 400 to 3600 c/s frequency transformer of the phase multiplier type. The described three-phase-operated prototype design provides a maximum output power of 40 watts. The performance is such that, with output power values up to about 20 watts, actual variations of the 3600 c/s output voltage are ±0.1... View full abstract»

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  • Power transfers in nonlinear frequency converters with three commensurable frequencies

    Publication Year: 1965, Page(s):53 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    For systems with three arbitrarily assigned commensurable frequencies and nonlinear coupling approximated by a truncated power series, the possibility of power transfers depends on the exponents of the polynomial describing the nonlinearity. The applicability of power-frequency relations, which is uncertain when the frequencies are commensurable, also depends on the form of the polynomial. Pertine... View full abstract»

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  • A new type magnetic modulator

    Publication Year: 1965, Page(s):56 - 62
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    A one-core magnetic modulator based on a new principle is described which operates as a high-sensitivity small-input dc-ac converter with a drift or noise level of the order of 10-16watts. The residual output in response to an excess input can be kept below about 10-μA turns in terms of equivalent input. In the case of push-pull connections, the characteristics are greatly improved... View full abstract»

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  • Anisotrophy control of Ni-Fe films through sequenced-field deposition

    Publication Year: 1965, Page(s):66 - 67
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (227 KB)

    Anisotropy of nickel-iron films of 82, 74, and 66 per cent nickel compositions was controlled by time-sequenced application of orthogonal fields during deposition. Resulting anisotropy values are in agreement with simpleM-induced anisotropy principles. Coercive forces show small but definite decrease with anisotropy constant. Dispersion angle is proportional to the reciprocal of the ani... View full abstract»

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  • Magnetic properties of multilayer films of FeNi-Mn-FeNiCo and of FeNi-Mn

    Publication Year: 1965, Page(s):63 - 65
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Experiments made on multilayer evaporated thin films with a structure FeNi-Mn-FeNiCo and FeNi-Mn exhibit strong evidence of a ferromagnetic-antiferromagnetic exchange coupling between the ferromagnetic film of FeNi and a transition layer at the FeNi-Mn interface obtained by mutual diffusion of Mn and FeNi at 300°C. The surface coupling energies measured may be as much as 0.3 erg/cm... View full abstract»

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  • Design of a fully associative cryogenic data processor

    Publication Year: 1965, Page(s):68 - 71
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The following material has detailed the computational algorithms and basic cryotron circuits necessary to provide fully associative search operation and flexible data handling characteristics in a fully associative cryogenic data processor. Although a detailed description of total processor system design is beyond the scope of this text, its major characteristics have been treated. A newly develop... View full abstract»

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  • [Back cover]

    Publication Year: 1965, Page(s): 0
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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