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Proceedings of the IEEE

Issue 6 • Jun 1990

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Displaying Results 1 - 8 of 8
  • Diluted magnetic semiconductors

    Publication Year: 1990, Page(s):990 - 1003
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (984 KB)

    Diluted magnetic semiconductors (DMSs), i.e. semiconducting crystals whose lattice is made up in part of substitutional magnetic ions (e.g. Cd1-xMnxTe, Hg1-xFex Se, Zn1-xCoxS), are reviewed. The focus is on materials of the type A1-xII MnxB VI, which are the most thoroughly understood. How... View full abstract»

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  • A review of magnetic sensors

    Publication Year: 1990, Page(s):973 - 989
    Cited by:  Papers (294)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1424 KB)

    Eleven of the most common technologies used for magnetic field sensing are described and compared. These are the search coil, flux-gate, optically pumped, nuclear precession, SQUID, Hall-effect, magnetoresistive, magnetodiode, magnetotransistor, fiber optic, and magnetooptic technologies. The use of these sensors in relation to working with or around the Earth's magnetic field is addressed. Three ... View full abstract»

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  • Soft magnetic materials

    Publication Year: 1990, Page(s):947 - 972
    Cited by:  Papers (51)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2144 KB)

    The state of art is reviewed with an emphasis on recent research results and a view to identifying areas in which further developments in materials and processing might lead to even better properties and greater application of novel technology. Basis magnetic considerations are discussed, namely, B-H loop shape, core loss, magnetic anisotropy and annealing, and magnetostriction a... View full abstract»

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  • Achievements in rotary head magnetic recording

    Publication Year: 1990, Page(s):1004 - 1016
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    The principal achievements since 1980 in rotary head recording on magnetic tape are outlined. These developments are related to fundamental improvements in recording media, heads, the design of tape transports, and signal processing. The D-1 and D-2 video tape recorders (VTRs), the Hi-Band 8-mm video cassette recorder (VCR), and the rotary digital audio tape (R-DAT) recorders are discussed. The fu... View full abstract»

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  • Modeling of magnetizing processes

    Publication Year: 1990, Page(s):1017 - 1026
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Quasi-static magnetic processes such as those found in magnetic recording are examined. The hysteresis in medium-hard magnetic materials of the type used in recording media and the magnetizability of soft magnetic materials such as those used in recording heads are discussed. Two general modeling techniques are used to describe these processes: physical modeling and phenomenological modeling. In p... View full abstract»

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  • Spin-wave instabilities, auto-oscillations, and chaos in yttrium-iron-garnet

    Publication Year: 1990, Page(s):893 - 908
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    A review is presented of recent experimental results in yttrium-iron-garnet subject to three different spin-wave pumping mechanisms: parallel pumping, subsidiary resonance (first-order Suhl process), and premature saturation of the main resonance (second-order Suhl process). A theoretical model derived from first principles and leading to coupled nonlinear spin-wave equations, is used to interpret... View full abstract»

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  • Thin film magnetism

    Publication Year: 1990, Page(s):909 - 922
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB)

    New developments in thin-film magnetism are reviewed with an emphasis on the ultrathin regime. Relatively simple metallic systems in overlayer, sandwich, and superlattice configurations are covered. Sample fabrication, characterization, and magnetic measurement techniques are outlined, highlighting some of the more modern experimental innovations. Current issues and advances that demonstrate the s... View full abstract»

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  • Modern permanent magnets for applications in electro-technology

    Publication Year: 1990, Page(s):923 - 946
    Cited by:  Papers (61)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2100 KB)

    The range of materials and properties now at the disposal of design engineers is described. Current uses of permanent magnets are reviewed, with particular attention to engineering and economic aspects. The rapid broadening of magnet uses is now occurring as traditional devices are miniaturized, and new applications and design concepts evolve. Currently evolving materials and production processes,... View full abstract»

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