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Magnetics, IEEE Transactions on

Issue 6  Part 3 • Date Nov. 1995

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Displaying Results 1 - 6 of 6
  • Comments and corrections to "Nonreciprocity in magnetoelectric crystals"

    Page(s): 4312 - 4313
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (97 KB)  

    For original paper see C.M. Krowne, ibid., vol.31, no.3, pp.2209-14 (1995). A more rigorous derivation is provided along with a discussion of the electric and magnetic susceptibility tensor contributions to the electric and magnetic polarizations which lead to an assessment of nonreciprocity. View full abstract»

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  • 1995 Index IEEE Transactions on Magnetics Vol. 31

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    Freely Available from IEEE
  • A Jiles-Atherton and fixed-point combined technique for time periodic magnetic field problems with hysteresis

    Page(s): 4306 - 4311
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (452 KB)  

    The paper presents a finite element solution of periodic steady state magnetic field problems in soft materials with scalar hysteresis. The Jiles-Atherton model is employed for the generation of symmetric B-H loops and it is coupled with the Fixed Point technique for handling magnetic nonlinearities. The proposed procedure is applied to a hysteretic model problem whose analytical solution is available. The results show that the Fixed Point technique can efficiently deal with non-single valued material characteristics under periodic operating conditions View full abstract»

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  • Magneto-optical visualizer-magnetometer of high magnetic fields

    Page(s): 4293 - 4296
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (364 KB)  

    A device for visualization of the magnetic fields in the range 10-105 Oe by the magneto-optical method with spatial resolution ~10 microns is proposed. Thin epitaxial ferrite-garnet “easy axis in-plane” films were used as the measuring element. The dynamic range of the device was limited by 8-bit frame-grabber and radio-frequency circuit noise and was really equal to 42 dB. To broaden the range of visualized magnetic fields a set of epitaxial films with different parameters were applied. Some possible applications of this device are considered View full abstract»

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  • Solution of inverse problems by using FEM and structural functions

    Page(s): 4297 - 4305
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    An approach for identification of structural anomalies in physical systems is presented, which combines the advantages of the Finite Element method (FEM), the Controlled-Source Electromagnetic method (CSEM) and the Statistical Experiment Design method. It consists of three main steps: forward analysis, inverse analysis and regularization, At the first stage, an empirical model of the physical system, based on the FEM and the Design of Experiments (DOE) method, is created. Next, data which is easily observable is introduced into the model to form a nonlinear system of simultaneous equations. And third, after finding the solutions, an appropriate procedure of regularization determines the “best” one. The latter includes the unknown parameters of the anomaly to be identified. The paper outlines the advantages of the approach and its usefulness for identification problem solution View full abstract»

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  • A spacing sensor for magnetic disk systems

    Page(s): 4287 - 4292
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    A sensor based on Frustrated Total Reflection (FTR) for measuring spacing between magnetic disks and sliders has been developed. Theoretical evaluation shows that when polarization and incident angle are properly chosen, this sensor should have twice the measurement range and at least three times the resolution of traditional methods of spacing measurement which use interference. The measurement range of the FTR sensor can be optimized for typical disk-slider spacings (<100 nm) easily, by changing the incident angle of the light. To evaluate its operation, the sensor was fabricated on the side of a glass slider by a lithography technique and spacing was measured. Taking the 20 nm offset caused by the beveled edge of the slider into account, measurement error was less than 1 nm for P polarized light and 10 nm for S polarized light. This sensor could potentially measure spacing between real magnetic disks and ceramic sliders, View full abstract»

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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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Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology