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2016 | 60 | 92-102
Article title

The Magnetic Moments of Single-Domain and its Mathematics Formation

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We now demonstrate that such "uniaxial" particles can allow several quantifiable stable (or metastable) orientations of the magnetic moment within the same particle. A new model is presented with quantitative predictions verified by experiments. The results have important implications for rock magnetism, palaeomagnetism, and magnetic materials research. Firstly, the new model quantitatively accounts for several previously unexplained diverse phenomena exhibited by such single-domain (SD) particles. Including the acquisition of gyroremanences, tiled-impressed anisotropy, and transverse components of reminisce in individual particles. These phenomena are theoretically impossible in idealized uniaxial single domain particles, and could now be used to quantify the deviation of real particles from ideal behavior. Secondly, deflections of the natural remanence vector and computations of the ancient field vector and paleointensity are not only controlled by the shape and distribution of the particles, but also by the possible stable orientations of the moments within single-domain particles. The model is also relevant to other single-domain particle morphologies.
Physical description
  • Department of Physics, College of Science, AL-Mustansirya University, Bahgdad, Iraq
  • [1] Stoner E. C. and Wohlfarth E. P. 1948. A mechanism of magnetic hysteresis in heterogeneous alloys. Phil. Trans. Roy. Soc. A240, 599-642
  • [2] Knowles J. E. 1984. The measurement of the anisotropy field of single “tape” particles IEEE Trans. Magnetics, 20, 85-87
  • [3] Potter D. K. and Stephenson A. 1988. Field-induced magnetic anisotropy in a dilute dispersion of gamma - Fe2O3 particles. J. App. Phys. 63, 1691-1693.
  • [4] Potter D. K. and Stephenson A. 1990 a. Field-impressed anisotropies of magnetic susceptibility and remanence in minerals. J. Geophys. Res. – Solia / Earth 95, 15573-15588.
  • [5] Potter D. K. and Stephenson A. 1990 b. Field-impressed magnetic anisotropy in rocks. Geophys. Res. Lett. 17, 2437-2440.
  • [6] Stephenson A. 1980 a. Gyromagnetism and the remanence acquired by a rotating rock in an alternating magnetic field. Nature 284, 48-49.
  • [7] Stephenson A. 1980 b. A gyroremanent magnetization in anisotropic magnetic material. Nature 284, 49-51.
  • [8] Stephenson A. 1981. Gyromagnetic remanence and anisotropy in single-domain particles, rocks, and magnetic recording tape. Phil. Mag. B 44, 635-664.
  • [9] Stephenson A. and Potter D. K. 1987. Gyroremanent magnetizations in dilute anisotropic dispersions of gamma-ferric oxide particles from magnetic recording tape. IEEE Trans. Magnetics, 23, 3820-3830
  • [10] Faten Sajet, Study magnetic domains walls motion for ferromagnetic materials by using genetic algorithms. PhD thesis, AL-Mustansiryah University, College of Science, 2005.
  • [11] Stephenson A. Sadikun S. and Potter D. K. 1986. A theoretical and experimental comparison of the anisotropies of magnetic susceptibility and remanence in rocks and minerals. Geophys. J. R. axlr. Soc. 84, 185-200.
  • [12] Knowles J. E. 1988. A reply to “perfect and imperfect particles”. IEEE Trans. Magnetics, 24, 2263-2265.
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