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Large cone angle magnetization precession of an individual nanomagnet with dc electrical detection

M. V. Costache·S. M. Watts·M. Sladkov·C. H. van der Wal·B. J. van Wees
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Abstract

We demonstrate on-chip resonant driving of large cone-angle magnetization precession of an individual nanoscale permalloy element. Strong driving is realized by locating the element in close proximity to the shorted end of a coplanar strip waveguide, which generates a microwave magnetic field. We used a microwave frequency modulation method to accurately measure resonant changes of the dc anisotropic magnetoresistance. Precession cone angles up to $9^{0}$ are determined with better than one degree of resolution. The resonance peak shape is well-described by the Landau-Lifshitz-Gilbert equation.

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M. V. Costache, S. M. Watts, M. Sladkov, C. H. van der Wal, B. J. van Wees. 2006-09-08. Large cone angle magnetization precession of an individual nanomagnet with dc electrical detection. https://doi.org/10.1063/1.2400058

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