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Electrical detection of internal dynamical properties of domain walls

Soraya Sangiao 1 Michel Viret 2, *
* Corresponding author
2 LNO - Laboratoire Nano-Magnétisme et Oxydes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
Abstract : We report here on the electrical detection of the ferromagnetic resonance in a notched Py stripe using the spin rectification effect. A lock-in detection technique is used to measure the rectified voltage generated when applying a radio-frequency field. The multiple peaks associated with the presence of a domain wall, observed during field scans, are properly identified with the help of dynamical micromagnetic simulations. It is found that at any frequency below 6 GHz some specific areas of the inhomogeneous magnetization within the domain wall can find a resonant condition and generate a voltage by rectification of the induction currents in the circuit.
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Soraya Sangiao, Michel Viret. Electrical detection of internal dynamical properties of domain walls. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2014, 89, pp.104412. ⟨10.1103/PhysRevB.89.104412⟩. ⟨cea-01377263⟩

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