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

Published

Author(s)

Michael Schneider, Justin Shaw, Anthony B. Kos, Thomas Gerrits, Thomas J. Silva, Robert McMichael

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

Keywords

magnetic nano-dots, magneto optics, magnetodynamics

Citation

Schneider, M. , Shaw, J. , Kos, A. , Gerrits, T. , Silva, T. and McMichael, R. (2007), Spin dynamics and damping in nanomagnets measured directly by frequency-resolved magneto-optic Kerr effect, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32692 (Accessed April 14, 2024)
Created November 26, 2007, Updated October 12, 2021