Direct experimental measurement of phase-amplitude coupling in spin torque oscillators

Autor:	Bianchini, L., Cornelissen, S., Kim, Joo-Von, Devolder, T., van Roy, W., Lagae, L., Chappert, C.
Rok vydání:	2010
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Appl. Phys. Lett. 97, 032502 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1063/1.3467043
Popis:	We study spin-torque induced oscillations of MgO magnetic tunnel junctions in the time domain. By using the Hilbert transform on the time traces, we obtain for the first time a direct experimental measure of the coupling between the power and the phase fluctuations. We deduce the power restoration rate and we obtain low values for the coupling strength, which is consistent with the weak frequency dependence on the applied voltage. Comment: 3 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1004.5319 Zobrazit plný text záznamu View this record from Arxiv