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Publication Citation: Spin dynamics and damping in nanomagnets measured directly by frequency-resolved magneto-optic Kerr effect

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Author(s): Michael Schneider; Justin M. Shaw; Anthony B. Kos; Thomas Gerrits; Thomas J. Silva; Robert D. McMichael;
Title: Spin dynamics and damping in nanomagnets measured directly by frequency-resolved magneto-optic Kerr effect
Published: November 27, 2007
Abstract: The spin dynamics of sub-100 nm Ni80Fe20 nanomagnets are directly measured using the magneto-optic Kerr effect and a broadband detection scheme. Elliptical dots approximately 68nm in diameter and 10 nm thick were fabricated in 20x20υm^2^ arrays. There is approximately a factor of 2 increase in the effective linewidth when compared to a 20 υm^2^ diameter continuous disk of the same material. Using micromagnetic simulations, we model the effect of dot-to-dot size variation on the effective linewidth and find that 2 nm size variations are more than sufficient to account for the effective increase in linewidth.
Citation: Physical Review Letters
Volume: 102
Pages: pp. 103909-1 - 103909-5
Keywords: magnetic nano-dots;magneto optics;magnetodynamics
Research Areas: Electromagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (466KB)