Electrical detection of internal dynamical properties of domain walls

Soraya Sangiao (1) , Michel Viret (2)

1 SPEC - UMR3680 - Service de physique de l'état condensé
2 LNO - Laboratoire Nano-Magnétisme et Oxydes

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.

Domaines: Physique [physics]

Soraya Sangiao, Michel Viret. Electrical detection of internal dynamical properties of domain walls. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89, pp.104412. ⟨10.1103/PhysRevB.89.104412⟩. ⟨cea-01377263⟩