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IEEE Translation Journal on Magnetics in Japan

Issue 8 • Aug. 1987

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Displaying Results 1 - 25 of 34
  • [Front cover]

    Publication Year: 1987, Page(s): c1
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    Freely Available from IEEE
  • 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):673 - nil2
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  • Thick-Film Crystal Growth of Highly Bi-Substituted Garnet for Optical Isolators

    Publication Year: 1987, Page(s):674 - 679
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1266 KB)

    We studied the melt composition to obtain pit-free, highly Bi-substituted (BiLu)3 Fe5 O12 crystals by the LPE method. It was confirmed that adding B2 O3 to the melt increases the equilibrium segregation coefficient of Bi K0(Bi), and we found that a decrease in garnet composition ratio R4 acts to increase the growth rate d... View full abstract»

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  • DyBi Garnet Films with Improved Temperature Dependence of Faraday Rotation

    Publication Year: 1987, Page(s):680 - 686
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (818 KB)

    To improve the temperature dependence of the isolation value of magneto-optical Bi-substituted garnet films for use in optical isolators, the temperature dependence of the Faraday rotation coefficient was measured for (RBi)3 Fe5 O12 (R = Dy, Gd, Yb) and (GdBi)3 (FeAlGa)5 O12 films in the 1.3 and 1.5 ¿m wavelength bands. Among the v... View full abstract»

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  • Magneto-Optical Effects of Tetrahedrally Coordinated Co2+ in Ferrites

    Publication Year: 1987, Page(s):687 - 692
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (647 KB)

    A large magneto-optical effect near the 0.7 and 1.5 ¿m wavelengths in ferrites containing tetrahedral Co2+ ions was studied on the basis of crystal field theory, and the calculated spectrum described herein was found to essentially reproduce the experimentally observed Faraday rotation curves of the Co2+ ion substituted ferrites. Eigenstates corresponding to the 0.7 and 1.5 ... View full abstract»

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  • Magnetic Properties of YFe, (Gd, Tb)-YFe Sputtered Films

    Publication Year: 1987, Page(s):693 - 697
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    YFe sputtered films were studied to clarify the behavior of Fe-Fe interactions in an amorphous RE-Fe matrix. The effect of the RE magnetism on the magnetic properties of RE-Fe films was also investigated using (Gd, Tb)-YFe sputtered films. Amorphous YFe films exhibit spin-glass like characteristics, that is, the magnetization does not saturate easily even at low temperatures because of the noncoll... View full abstract»

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  • Magneto-Optical Properties of PtMnSb Films Prepared by RF Magnetron Sputtering

    Publication Year: 1987, Page(s):698 - 703
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    PtMnSb Heusler alloy films were prepared by RF magnetron sputtering from mosaic targets. Films with a polar Kerr rotation and a Clb-PtMnSb (111) diffraction peak were obtained on glass substrates at room temperature. The compositions of these films were in the range 19 ⩽ x 32, 35 ⩽ y ⩽ 46 and 28 ⩽ z ⩽ 38 for PtxMnySbz (x + y ... View full abstract»

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  • Process of Magnetization Reversal in a Spot Heated by Pulsed Laser Beam

    Publication Year: 1987, Page(s):704 - 709
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1096 KB)

    The process of magnetization reversal in a bit written by a light beam was observed using a micro-Kerr effect measurement technique. Pulsed laser light (of wave-length 830 nm), combined with a synchronized, sinusoidally oscillating bias magnetic field, caused repeated writing and erasing of a bit. By monitoring cw laser light (633 nm) focused on the bit, the change in the Rerr rotation angle due t... View full abstract»

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  • Relation between Groove Shape and Signal Quality in Magneto-Optical Disks

    Publication Year: 1987, Page(s):710 - 719
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1215 KB)

    The relation between groove profile and signal quality in magneto-optical disks was investigated theoretically and experimentally. First, the static characteristics of disks were measured using a micro-magneto-optical effect measurement apparatus. The Kerr rotation angle (θk), reflectivity (Ro) and coercive force in grooves 0.65 to 0.91 μm wide and 15 to 87 nm... View full abstract»

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  • Preparation of Iron Films by Dual Ion Beam Sputtering and Their Soft Magnetic Properties

    Publication Year: 1987, Page(s):720 - 722
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The causes of differences in 4¿Ms and Hc values for iron thin films grown under the same conditions were studied. It was found that Hc reaches a minimum and 4¿Ms reaches a maximum when the radiation ion acceleration voltage is in the range 140 to 150 V. But the differences in values of Hc and 4¿Ms seem to be due to impurities lik... View full abstract»

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  • Soft Magnetic Properties of a-CoNbTi/SiO2 Layered Films

    Publication Year: 1987, Page(s):723 - 724
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    The effects of multilayering on the soft magnetic characteristics of a-CoNbTi/SiO2 amorphous alloy layered films were studied. Hc of a single-layer film increased rapidly as film thickness decreased from 300 Å, but Hc decreased by multilayering a-CoNbTi with SiO2 thin layers. Favorable ac characteristics were, however, not obtained when the magne... View full abstract»

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  • Corrosion Resistance Dependence on Ta and Zr Densities in Co-Ta and Co-Zr Alloy Films

    Publication Year: 1987, Page(s):725 - 727
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    Corrosion characteristics of CoZr and CoTa, related to Zr and Ta composition densities, were studied. Corrosion characteristics were analyzed by measuring electrical resistance increase (¿R/Ro) under 80°C and 85%RH atmosphere. It was confirmed that corrosion rates depended on Zr and Ta densities. Corroded layer thickness X was expressed by the equation X = ßlog(t + 1). It was found t... View full abstract»

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  • Influence of Substrate Heating on Properties of Tb-Fe Film Prepared by Vacuum Evaporation

    Publication Year: 1987, Page(s):728 - 729
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB)

    The influence of a temperature gradient during film growth on the magnetic characteristics of Tb-Fe films was studied. Two substrates were positioned in the vacuum chamber with one heated from below the substrate and the other heated from above by infrared radiation from a nichrome heater. This produced films with exactly the same composition, but with opposite in-plane direction temperature gradi... View full abstract»

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  • Amorphous Tb-Fe Magnetic Thin Films Prepared by Flash Evaporation

    Publication Year: 1987, Page(s):730 - 731
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (731 KB)

    Variation in the magnetization curve of amorphous Tb-Fe films prepared by the flash evaporation method while the substrate temperature is varied was studied to clarify the mechanism responsible for perpendicular anisotropy and high coercivity. It was found that a film prepared at a 473 K substrate temperature was a typical perpendicular magnetization film, but in a film prepared at a 77 K substrat... View full abstract»

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  • High Remanence in Laminated TbFe Films

    Publication Year: 1987, Page(s):732 - 733
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB)

    Single- and multi-layer high saturation magnetization TbFe films with high rectangularity were studied to obtain a film with high remanence. Lamination resulted in greatly improved remanence. No significant variation in Mr and Hc is observed in single-layer and double-layer films, but the remanence ratio for films of three layers or more is almost one and the Hc in... View full abstract»

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  • Magnetostriction of Amorphous GdFeco Films

    Publication Year: 1987, Page(s):734 - 735
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Magnetostriction in a GdFeCo thin film, produced by replacing a part of the Fe in the GdFe film with Co was measured to determine its contribution to the perpendicular anisotropy of amorphous films. Comparison with previously reported results showed that adding rare earth metals and metaloid elements to FeCo polycrystal to make it amorphous exerts a powerful influence on ¿s. View full abstract»

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  • Forced Magnetostriction in Amorphous Gd-Fe Films

    Publication Year: 1987, Page(s):736 - 737
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (246 KB)

    The relation between forced magnetostriction in amorphous Gd-Fe films and film composition was studied. It was discovered that the forced magnetostriction previously considered to be small enough to ignore is actually too large to ignore. The forced magnetostriction exhibits a significant dependence on film composition suggesting that it is strongly related to the Fe moment in the film. It was als... View full abstract»

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  • Magnetic Properties of R-Ni (R = Gd,Tb,Dy,Ho) Evaporated Films

    Publication Year: 1987, Page(s):738 - 739
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    Crystallographic, electrical, and magnetic properties of R-Ni (R = Gd, Tb, Dy, Ho) films were studied. The variation of the electrical resistance with temperature in the R-Ni films was extremely small, indicating that these films do not have the normal crystal structure. This was confirmed by x-ray diffraction patterns which showed that these films were is actually amorphous. View full abstract»

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  • Electron Spectroscopy Studies on Magneto-Optical Media and Plastic Substrate Interface

    Publication Year: 1987, Page(s):740 - 741
    Cited by:  Papers (491)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB)

    The depth-profiles of amorphous TbFeCo films sputtered onto polycarbonate substrate were studied by X-ray photoelectron spectroscopy. Oxidized metals, oxides and hydroxides for example, and adsorbed impurities were found to exist mainly in the vicinity of the film surface and film/ substrate interface. View full abstract»

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  • Structures and Material Characteristics of Magneto-Optical Disks

    Publication Year: 1987, Page(s):742 - 743
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The effect of different methods of applying SiO protective layers to magneto-optical disks are discussed. These layers were applied using resistance heating (RH) evaporation, electron beam (EB) evaporation and sputtering. Compositional disparity was observed between the applied films and their sources for each of the different application methods. This disparity was largest with sputtering and sma... View full abstract»

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  • Process of Magnetization Reversal in a Spot Heated by Pulsed Laser Beam

    Publication Year: 1987, Page(s):744 - 745
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (533 KB)

    A pulsed laser beam was fired at Tb(FeCo) films (2 ¿m spot diameter) and its effect on Kerr rotation angle (¿K) aging was studied, using an avalanche photo diode (APD) as a monitor. It was found that in RE-rich films, the magnetization changed whether or not a bias magnetic field was applied. No such signal was observed in TM-rich films in zero magnetic fields, possibly because of the... View full abstract»

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  • Write-Read Characteristics of Magneto-Optical Recording

    Publication Year: 1987, Page(s):746 - 747
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB)

    In this report, the authors discuss the relationship between peak shift and bit length as they search for ways to lower the bit error rate of magneto-optical disks used in writable/erasable optical memories. The bit error rate of both width recording and edge recording were compared, and it was found that in response to fluctuations in the recording power, edge-recorded information did not change,... View full abstract»

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  • Preparation of Bi, Ga-substituted Garnet Films on Glass Substrates by RF Sputtering II

    Publication Year: 1987, Page(s):748 - 749
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (866 KB)

    The relation between film growth, heat treatment conditions, optical heterogeneities, and grain boundaries was studied in Bi, Ga-substituted YIG films. Films formed in an Ar atmosphere and heat treated for 3 hours at 540°C in O2 was optically very homogeneous but slightly magnetically inhomogeneous. In spite of these magnetic inhomegeneities, the written bits were almost perfect circle... 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