Magnetic tunnel junction (MTJ) devices find use in several applications based on the exploitation of the spin-transfer torque phenomenon. The ferromagnetic resonance (FMR) curve is a key characteristic of any MTJ. It is usually characterized both experimentally and numerically by performing a lot of measurements of the magnetic response to a sinusoidal field or current. Here, we propose the use of a chirp signal as excitation signal to reconstruct the FMR curve with a single measurement/simulation. A micromagnetic comparison of the proposed method with the traditional one is shown.
Chirp spectroscopy applied to the characterization of Ferromagnetic resonance in Magnetic Tunnel Junctions / Ricci, M; Burrascano, P; Carpentieri, Mario; Tomasello, R; Finocchio, G.. - In: IEEE TRANSACTIONS ON MAGNETICS. - ISSN 0018-9464. - 50:11(2014). [10.1109/TMAG.2014.2323269]
Chirp spectroscopy applied to the characterization of Ferromagnetic resonance in Magnetic Tunnel Junctions
CARPENTIERI, Mario;Tomasello R;
2014-01-01
Abstract
Magnetic tunnel junction (MTJ) devices find use in several applications based on the exploitation of the spin-transfer torque phenomenon. The ferromagnetic resonance (FMR) curve is a key characteristic of any MTJ. It is usually characterized both experimentally and numerically by performing a lot of measurements of the magnetic response to a sinusoidal field or current. Here, we propose the use of a chirp signal as excitation signal to reconstruct the FMR curve with a single measurement/simulation. A micromagnetic comparison of the proposed method with the traditional one is shown.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
