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

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.

References in corpus (3)

• Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• On-chip detection of ferromagnetic resonance of a single submicron permalloy strip

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