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Magnetics in Japan, IEEE Translation Journal on

Issue 3 • Date March 1987

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Displaying Results 1 - 25 of 36
  • [Front cover]

    Publication Year: 1987 , Page(s): c1
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  • List of Contributors

    Publication Year: 1987 , Page(s): nil1
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  • [Breaker page]

    Publication Year: 1987 , Page(s): nil1
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  • Table of contents

    Publication Year: 1987 , Page(s): 193 - nil2
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  • Fabrication and Properties of Double Layer Perpendicular Rigid Disks

    Publication Year: 1987 , Page(s): 194 - 200
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    Perpendicular magnetic recording is a promising method for the achievement of higher recording densities. The magnetic and crystal orientational properties of double-layer rigid disks for perpendicular magnetic recording were studied. The coercive force distribution in the Mo-Cu-Permalloy underlayer was investigated as a function of the sputtering gas pressure. At optimum Ar gas pressure, good uni... View full abstract»

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  • Magnetic Properties and Structure for Compositionally Modulated Co-CoOx Films

    Publication Year: 1987 , Page(s): 201 - 207
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    To clarify the influence of CoO spins on the magnetic properties of Co-CoO reactive-sputtered films, Co-CoOx compositionally modulated (CM) films were investigated. These Co-CoOx CM films were prepared by modulating the oxygen partial pressure (Po2) in the vacuum chamber. These films have Co-CoO interfaces parallel to the film plane. The coercivity (Hc) ... View full abstract»

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  • Control of Thickness Dependence of Perpendicular Coercivity on Electroless Co-Ni-Re-P Alloy Thin Films

    Publication Year: 1987 , Page(s): 208 - 214
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    Electroless Co alloy films for use as perpendicular magnetic recording media were investigated with respect to the thickness dependence of their magnetic properties. The read/write characteristics, especially the dependence of the overwrite on the recording density, were very different for Co-Ni-Re-Mn-P films and Co-Ni-Re-P films. Since those films displayed different thickness dependences of perp... View full abstract»

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  • Stability of Ba-Ferrite Magnetic Recording Media.

    Publication Year: 1987 , Page(s): 215 - 221
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    Stress and temperature stabilities of Ba-ferrite perpendicular magnetic recording media have been investigated. The stress-induced rate of decrease of remanent magnetization in the media was found to be as small (1 × 10-5 per kg/cm2) as the values for metal and Co-γ-Fe2O3 media. The remanent magnetization in the perpendicular direction remains a... View full abstract»

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  • Microscopic Structure and Magnetic Properties of Bi Added FeMn Alloy

    Publication Year: 1987 , Page(s): 222 - 227
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    Magnetic thin films of Mn-ferrite (MnFe2O4) have shown a large perpendicular magnetic anisotropy by the evaporation method. The evaporation substances are the (A¿Bß)100¿xCx system, where A, B, and C represent the matrix elements of combination for Mn, Fe, and Bi, respectively. For (Mn25Fe75)97Bi3, column-sha... View full abstract»

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  • Composite Type Magnetoresistive Sensor Composed of Ni-Co And Permalloy Films

    Publication Year: 1987 , Page(s): 228 - 229
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    The effects of reduction in demagnetization field on stripe width, the stability of domain structure, and the magnetoresistive effect in the elements with Ni-Co films and Permalloy films of varying stripe widths were studied. We also investigated the read characteristics of each of the elements. Replacing the conventional structure with a composite structure reduced the demagnetizing field by half... View full abstract»

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  • Magnetic Properties of Magnetoresistive Element Field

    Publication Year: 1987 , Page(s): 230 - 231
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    The effects of performing annealing in a magnetic field after magneto resistive (MR) element formation in yoke-type MR heads were studied. It was found that the annealing temperature range in which an amorphous alloy with high permeability is obtained was close to 440-450°C. The fine stripe MR element formed before the amorphous alloy film is affected by annealing in a magnetic field. At a film t... View full abstract»

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  • Iron Loss of Supermalloy Film Core

    Publication Year: 1987 , Page(s): 232 - 234
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    The suitability of a supermalloy thin film about 1 ¿m thick for use in 1 MHz power equipment was studied. The relationship between the hysteresis loss Wh and the maximum flux density Bm for the approximately 1 ¿m thick films deposited on SiO2 substrate is approximately Wh ¿ Bm1.75. This shows the same tendency as that for the rol... View full abstract»

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  • Ferrite Plating by Means of Thin Film of Reaction Solution; "Thin Liquid-Film Method"

    Publication Year: 1987 , Page(s): 235 - 236
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    A new method is proposed for ferrite plating to overcome the disadvantages with the conventional ferrite plating based on the rotating disk method and spraying method. The ferrite film is grown in a stainless steel reaction cell, in which the reaction solution forms a "thin (~ 50 μm) liquid film" between a substrate and a cell wall. By intermittently introducing an oxidizing solution, whic... View full abstract»

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  • Crystal Structure of Amorphous Magnetic Oxide Thin Films in Ni-Fe-P System

    Publication Year: 1987 , Page(s): 237 - 238
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    The crystal structure of magnetic amorphous oxide thin films in the Ni-Fe-P system made by the two source evaporation method was studied. When the amorphous thin films are heated, the magnetization disappears at the Curie temperature (Tc1), but, at almost exactly the same time, crystallization begins and causes the magnetization to once again increase. Finally the magnetization of the c... View full abstract»

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  • Magnetic Properties of Fe-C Films Prepared by Getter Sputtering Method

    Publication Year: 1987 , Page(s): 239 - 240
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    The magnetic properties and structure of Fe-C system thin films were studied. Values of the intrinsic coercivity MHC increase from 50 ~ 70 Oe at a substrate temperature Tsub = 200°C to their maxima of 250 ~ 310 Oe at Tsub = 350°C. The saturation magnetization Ms varies from 600 to 900 G, reaching a minima in the Tsub range between... View full abstract»

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  • Magnetic Oxide Films with Low at Valence Components in Fe-P System

    Publication Year: 1987 , Page(s): 241 - 242
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    The microstructure, magnetic and magneto-optical properties of Fe-p system amorphous magnetic oxide films were studied. X-ray diffraction showed clearly that the leveling off of the magnetization at 250°C after heat treatment was due to the generation of Fe3O4 crystallization. The reduction in magnetization at about 600°C indicated that the magnetism of the fi... View full abstract»

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  • Magnetic Properties of Fe-Si Sputtered Films

    Publication Year: 1987 , Page(s): 243 - 245
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    A detailed investigation of the relation between the differences in Fe-Si film structure governing its soft magnetic properties and film magnetic properties is discussed. The absolute values of Hc showed extreme variation with different growth conditions. The composition for which Hc was minimal was 7 to 8 wt% Si at 3.5 kV, but at 2.0 kV it was displaced to the high-Si-conten... View full abstract»

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  • Magnetic Properties of Fe-Al-Si Sputtered Films

    Publication Year: 1987 , Page(s): 246 - 248
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    Whereas Fe-Al-Si film of composition 5.5 percent Al-9.5 percent Si-remainder Fe (Sendust composition range) has a high permeability and good soft magnetic properties, the sensitivity of the latter to composition changes presents difficulties as regards film formation. The authors studied another promising composition range, 2.5 percent Al-5.5 percent Si-remainder Fe, sputtering films in this range... View full abstract»

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  • Magnetic Properties of SmCo Sputter-Deposited Polycrystalline Films

    Publication Year: 1987 , Page(s): 249 - 250
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    SmCo polycrystalline films were sputter-formed on glass substrates at temperatures between 200 and 300°C, and relations between precipitated phases and film magnetic properties were studied. Phases with Sm-Co stoichiometric ratios of 2-17, 1-5, 1-3, and 1-2 were tentatively identified; these phases exhibit widely varying coercivities, in the ranges of several hundred Oe, several kOe, aroun... View full abstract»

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  • Magneto-Optical Effect of Invar Films

    Publication Year: 1987 , Page(s): 251 - 252
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    Whereas an fcc structure has been reported for vacuum evaporated FeNi thin films, magnetostriction and other effects may result in precipitation of other phases. To study local phase precipitation in such thin films, measurements of the magneto-optical effect, the Hall effect, ferromagnetic resonance absorption spectra, and other magnetic properties were performed. The Kerr rotation angle was foun... View full abstract»

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  • Magnetic Anisotropy of Co Thin Films Prepared by Oblique Incidence

    Publication Year: 1987 , Page(s): 253 - 254
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    To investigate exchange interactions between metallic cobalt and CoO, the authors formed cobalt thin films oxidized to varying degrees, by oblique (65°) evaporation onto polyimide films, and studied the magnetic and other properties as functions of x = (metallic cobalt mass)/(total cobalt mass). The coercivity increased with x in all cases, and the temperature dependence of the uniaxial anisotrop... View full abstract»

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  • Magnetic Properties of Fe-Co Thin Films Deposited by Ion Beam Sputtering

    Publication Year: 1987 , Page(s): 255 - 257
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    Fe-Co thin films were formed on slide glass by ion beam sputtering, and their magnetic properties were investigated for various compositions, substrate temperatures and annealing conditions. The bcc structure films deposited at low temperatures received a compressive stress from substrates, which decreased and changed to a tensile stress as the substrate temperature was raised, caused by accelerat... View full abstract»

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  • Oxidation on Target Surface in RF Sputtering of Iron Targets

    Publication Year: 1987 , Page(s): 258 - 260
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    To investigate the sudden change in deposition rate and film structure at a critical value of the oxygen gas partial pressure (Po2) during reactive sputtering of iron targets, the authors formed film at various rf input powers, while measuring the temperature of a thermocouple placed between target and substrate. A hysteresis effect in the temperature with respect to input power was fou... View full abstract»

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  • U-Type Target for High Rate Sputtering Method

    Publication Year: 1987 , Page(s): 261 - 263
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    A new type of sputtering target, which produces magnetic fields strong enough for magnetron sputtering of ferromagnetic targets, and a high concentration of particle beams was developed. The prototype target is a U-shaped target, but with no target material on the bottom of the "U". In experiments, a uniform 130 Oe field was applied from the sides of the target with an electromagnet. The measured ... View full abstract»

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  • Physical Considerations on Magnetostatic Energy

    Publication Year: 1987 , Page(s): 264 - 265
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    The author considers there are ambiguities surrounding usage of the terms ``demagnetizing energy" and ``magnetostatic energy", taking as a concrete example the physics of magnetic bubbles. Here, on considering the bubble region only, a difference in sign arises between the magnetic potential energy (negative) and the demagnetizing energy (positive). Considerations of a cylindrical magnetic body in... 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.

Full Aims & Scope

Meet Our Editors

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