Accuracy of 45° torque method for obtaining anisotropy constant of 2D random films

ArticleinIEEE Transactions on Magnetics 35(5):2673 - 2675 · October 1999with2 Reads
Impact Factor: 1.39 · DOI: 10.1109/20.800944 · Source: IEEE Xplore

    Abstract

    Computer simulation was used to examine the accuracy of anisotropy
    energy constant, K<sub>2</sub> of thin film media obtained from the
    45° torque method. The easy axes of the media were distributed
    randomly in plane. The obtained K<sub>u</sub> value depends on range of
    the applied field. For 2D random media with H<sub>K</sub>=1-40 kOe, M
    <sub>s</sub>=100-600 emu/cm<sup>3</sup>, A=0-1×10<sup>-6</sup>
    erg/cm, separation between adjacent grains=0-a nm, the difference
    between obtained K<sub>u</sub> value and exact K<sub>u</sub> was at most
    20%, if the range of applied field was larger than 10-20 kOe. Here, the
    standard values of the physical parameters were H<sub>K</sub>=10 kOe, M
    <sub>s</sub>=460 emu/cma, A=0, separation between adjacent grains=0, and
    each parameter was varied successively