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Analytical Determination of the Landau Lifshitz Gilbert (LLG) Zero-Damping Critical Switching Field

Published

Author(s)

Donald G. Porter

Abstract

Previous numerical studies based on the Landau Lifshitz Gilbert (LLG) equation have considered the magnetization reversal of a uniaxial, single-domain particle due to an applied field pulse with a short rise time. When the LLG damping constant [alpha] z = (sin2[theta]cos[theta])/2(cos[theta]-1); hy = sin [theta] (cos[theta]-1)/2; \[theta]\[GE] 2[pi]/3. A non-parametric form is also derived. One surprising implication is that magnetization reversal may be caused by an applied field with easy axis component in the same direction as the initial magnetization (hz > 0).
Citation
IEEE Transactions on Magnetics
Volume
34
Issue
4

Keywords

high-speed switching, Landau-Lifshitz dynamics, Stoner-Wohlfarth model

Citation

Porter, D. (1998), Analytical Determination of the Landau Lifshitz Gilbert (LLG) Zero-Damping Critical Switching Field, IEEE Transactions on Magnetics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=150719 (Accessed May 21, 2024)

Issues

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Created July 1, 1998, Updated June 2, 2021