Effective Demagnetizing Factors in Ferromagnetic-Resonance Kittel Equation

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概要

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• Simple equations of effective demagnetizing factors ${N_{x}}^{\text{e}}$ and ${N_{y}}^{\text{e}}$ for use in Kittel's ferromagnetic resonance (FMR) formula have been derived for the first time. The effective demagnetizing factors are derived from anisotropy energy ($G$) and a static field direction expressed by a spherical coordinate system ($\theta,\phi$). Using the equations, the resonance equation at every direction can be easily calculated without the need for crystal-axis rotation. Compared with Macdonald's derivation, our derivation is simple.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2003-11-15

著者

• Kohmoto Osamu

  Department Of Physics Faculty Of Science Okayama University

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