Abstract
We study the magnetization reversal of isolated and interacting single-domain cobalt nanoparticles with uniaxial anisotropy under the macrospin approximation. We analyze the consequences of dipolar interaction on the reversal time. The effect of temperature on the probability to switch the magnetization using a linearly chirped pulse to drive the precession is investigated.
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References
H. Kesserwan, G. Manfredi, J.-Y. Bigot, P.-A. Hervieux, “Magnetization reversal in isolated and interacting single-domain nanoparticles” Phys. Rev. B 84, 172407 (2011).
C. Thirion, W. Wernsdorfer, D. Mailly, “Switching of magnetization by nonlinear resonance studied in single nanoparticles” Nat. Mater. 2, 524-527 (2003).
N. Barros, M. Rassam, H. Jirari, H. Kachkachi, “Optimal switching of a nanomagnet assisted by microwaves” Phys. Rev. B 83, 144418 (2011).
Acknowledgments
The authors acknowledge the financial support of EQUIPEX UNION Grant (ANR-10-EQPX-52).
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© 2015 Springer International Publishing Switzerland
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Klughertz, G., Hervieux, PA., Manfredi, G. (2015). Magnetization Reversal in a Cobalt Nanoparticle. In: Bigot, JY., Hübner, W., Rasing, T., Chantrell, R. (eds) Ultrafast Magnetism I. Springer Proceedings in Physics, vol 159. Springer, Cham. https://doi.org/10.1007/978-3-319-07743-7_21
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DOI: https://doi.org/10.1007/978-3-319-07743-7_21
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