Micromagnetic Spin Structure

  • R. Skomski
Part of the Lecture Notes in Physics book series (LNP, volume 569)


Magnetization inhomogenities, associated for example with grain boundaries, give rise to local spin-dependent potentials and affect the magnetoresistance. The local magnetization M(r) depends on both intrinsic and extrinsic factors. Intrinsic properties, such as spontaneous magnetization and anisotropy, are determined on an atomic scale and are basically independent of the material’s real structure and history. Extrinsic properties, such as remanence and coercivity, are linked to magnetic hysteresis, realized on mesoscopic or macroscopic length scales, and are strongly real-structure dependent. The local magnetization M(r), which determines the magnetoresistance, is determined from a nonlinear and nonlocal micromagnetic energy functional containing the intrinsic properties as parameters. This chapter focuses on basic micromagnetic effects and on the spin structure at grain boundaries. Continuum and layer-resolved analytic calculations yield a quasi-discontinuity of the magnetization between misaligned and in-completely exchange-coupled grains and a disproportionally large grain-boundary magnetoresistance.


Domain Wall Magnetocrystalline Anisotropy Spontaneous Magnetization Local Magnetization Orbital Moment 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • R. Skomski
    • 1
  1. 1.Department of Physics and Astronomy and Center for Materials Research and AnalysisUniversity of NebraskaLincolnUSA

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