Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle

Autor:	Thadani, K. V., Finocchio, G., Li, Z. -P., Ozatay, O., Sankey, J. C., Krivorotov, I. N., Cui, Y. -T., Buhrman, R. A., Ralph, D. C.
Rok vydání:	2008
Předmět:	Condensed Matter - Other Condensed Matter Condensed Matter - Materials Science
Zdroj:	Phys. Rev. B 78, 024409 (2008)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.78.024409
Popis:	We measure the microwave signals produced by spin-torque-driven magnetization dynamics in patterned magnetic multilayer devices at room temperature, as a function of the angle of a magnetic field applied in the sample plane. We find strong variations in the frequency linewidth of the signals, with a decrease by more than a factor of 20 as the field is rotated from the magnetic easy axis to the in-plane hard axis. Based on micromagnetic simulations, we identify these variations as due to a transition from spatially incoherent to coherent precession. Comment: 15 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0803.2871 Zobrazit plný text záznamu View this record from Arxiv