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IEEE Translation Journal on Magnetics in Japan

Issue 1 • Jan. 1988

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Displaying Results 1 - 17 of 17
  • [Front cover]

    Publication Year: 1988, Page(s): c1
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  • List of contributors

    Publication Year: 1988, Page(s): nil1
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  • [Breaker page]

    Publication Year: 1988, Page(s): nil1
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  • Opinion

    Publication Year: 1988, Page(s): 1
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  • Table of contents

    Publication Year: 1988, Page(s): 2
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  • Fundamental Magnetoelastic Waves in a Thin Conductive Magnetostrictive Slab

    Publication Year: 1988, Page(s):3 - 12
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1291 KB)

    Magnetoelastic waves (MEWs) propagating in a thin conductive magnetostrictive slab were investigated theoretically, taking account of micro-eddy current contributions. The analysis was performed under the assumption that the medium is amorphous (isotropic elasticity) but has a uniaxial magnetic anisotropy in the slab plane. For such a medium, MEWs appear in three fundamental modes: a Lamb-type wav... View full abstract»

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  • Ion-Implanted Magnetic Bubble Memory Devices

    Publication Year: 1988, Page(s):13 - 21
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2214 KB)

    High-density magnetic bubble memory devices have been developed by using ion-implanted tracks. Hybrid type devices, composed of ion-implanted tracks for high-density data storage and Permalloy tracks for write and read functions, have an advantage in compatibility with Permalloy devices in commercial use. The characteristics of junctions connecting the two type tracks are improved by a new design ... View full abstract»

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  • Structure and Perpendicular Magnetic Properties of FeBi Films by Evaporation Method

    Publication Year: 1988, Page(s):22 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1180 KB)

    We have studied the dependence of the Bi composition on the perpendicular magnetic anisotropy of thin films evaporated from Fe100¿x Bix evaporant at the film growth site. The films were prepared by a point-source vacuum evaporation method in which Fe and Bi were evaporated from the same source. The evaporated films clearly showed perpendicular magnetization characteristics a... View full abstract»

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  • Co-Cr Perpendicular Anisotropy Film Deposited by Evaporation with Ion Bombardment

    Publication Year: 1988, Page(s):28 - 34
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2461 KB)

    The effect of ion bombardment during film growth was investigated for perpendicular anisotropy CoCr films. Films were prepared by a web-coater type evaporating system equipped with a Kaufman 3-cm ion source. The Ms, Hc ⊥ and δθ50 decreased, while Hk/spl pert/ and the grain size increased, in bombarded films. These results indicate... View full abstract»

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  • Magnetic Properties and Flux Reversal in Co-Cr Films Sputtered on Low Temperature Substrates

    Publication Year: 1988, Page(s):35 - 41
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2605 KB)

    Co-Cr films were prepared on polyimide substrates at temperatures Ts = 27°C and Ts ≫ 150°C by rf sputtering, while applying a magnetic field Ha of up to 41 Oe normal to the substrate, and/or a negative substrate bias voltage VB of up to 150 V. The films prepared at Ts = 27°C have good c-axis orientation (¿¿50 = 3.2°) an... View full abstract»

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  • Magnetic Domain Structures of Multilayered Permalloy Films for Magnetic Recording Thin Film Heads

    Publication Year: 1988, Page(s):42 - 48
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3179 KB)

    The domain structures of cores with patterned Permalloy films have been investigated in order to develop magnetic recording thin film heads with narrow track widths. For single-layered Permalloy films, domain patterns indicate that the writing and reading abilities decrease when the track width becomes less than 10 ¿m. For six-layer Permalloy films with an alumina interlayer of 0.02 ¿m, domain p... View full abstract»

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  • Characteristics of Metal Magnetic Thin Film in MIG Head and Head Performance

    Publication Year: 1988, Page(s):49 - 55
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1251 KB)

    A MIG head, with metal magnetic thin film in the gap, has been developed for use with high-coercivity media. But the head has problems with a pseudo-output caused by a pseudo-gap at the interface between the Fe-Al-Si alloy thin film and the ferrite, and low R/W efficiency. The pseudo-gap is caused by a damaged layer of ferrite by mirror lapping in the ferrite and the initial layer of the Fe-Al-Si ... View full abstract»

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  • High Density Recording with Single Pole Head

    Publication Year: 1988, Page(s):56 - 66
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2364 KB)

    The feasibility of high-bit-density recording was investigated experimentally using a perpendicular magnetic recording system employing a single-pole head and a Co-Cr/Ni-Fe double-layer medium. To improve the reproducing sensitivity and resolution, the following were adopted: (a) a newly-developed high-sensitivity single-pole head; (b) a medium with a relatively thin (0.1 ¿m) Co-Cr layer and a th... View full abstract»

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  • Perpendicular Magnetic Recording Media with Double-Recording-Layer having Different Coercivities

    Publication Year: 1988, Page(s):67 - 74
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (987 KB)

    A new recording layer construction for double-layer perpendicular recording media is proposed. The recording layer is composed of two strata, with a high-Hc (⊥) stratum on the surface side and a low-Hc (⊥) stratum on the soft magnetic layer side. As a result, the recording sensitivity is improved without decreasing the reproduced voltage. The total thickness o... View full abstract»

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  • A New Head-Pad Model for a Double Layered Flexible Disk System

    Publication Year: 1988, Page(s):75 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2406 KB)

    A novel head system composed of four spherical-surface pads and one small-sized head of the single-pole type was studied as a means of supporting a Co-Cr/permalloy flexible disk of diameter 3.5 inches. In a disk drive, the radial position on the disk of the head system was varied between 32 and 38 mm, at disk revolution rates ranging from 400 to 1000 rpm, to evaluate the effect of the head/pad con... View full abstract»

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  • A Study of the Write Gate for Bloch Line Memory Devices

    Publication Year: 1988, Page(s):82 - 88
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1204 KB)

    The write gate for Bloch line memory devices has been investigated by computer simulations and experiments. In the case of conventional gates where a write conductor is located at the stripe domain head, computer simulations showed that the VBL pair generation takes place in such a way that the horizontal wall magnetization between the generated VBLs is opposite in direction to the applied in-plan... View full abstract»

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  • Hydrogen Annealing Effects on the Optical Absorption Loss and Lattice Constant of Ca-Doped YIG and BiGdAlGaIG Films

    Publication Year: 1988, Page(s):89 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1005 KB)

    The effects of annealing in an H2 atmosphere on the optical absorption losses and lattice constants of Ca- and Si-doped YIG and Ca-doped (BiGd)3 (FeAlGa)5O12 films grown by LPE, were studied. Hydrogen annealing was carried out at 150 to 500°C for 22 hours. The absorption losses and lattice constants in YIG films with poor impurities or with Si doping di... View full abstract»

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Aims & Scope

IEEE Translation Journal on Magnetics in Japan is a publication of the IEEE Magnetics Society published between 1985 and 1994.

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Meet Our Editors

Editor-in-Chief
James E. Opfer
Hewlett-Packard