Non-linear vortex dynamics and transient effects in ferromagnetic disks

Autor:	Cheng, X. M., Buchanan, K., Divan, R., Guslienko, K. Y., Keavney, D. J.
Rok vydání:	2009
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.79.172411
Popis:	We report a time resolved imaging and micromagnetic simulation study of the relaxation dynamics of a magnetic vortex in the non-linear regime. We use time-resolved photoemission electron microscopy and micromagnetic calculations to examine the emergence of non-linear vortex dynamics in patterned Ni80Fe20 disks in the limit of long field pulses. We show for core shifts beyond ~20-25% of the disk radius, the initial motion is characterized by distortions of the vortex, a transient cross-tie wall state, and instabilities in the core polarization that influence the core trajectories. Comment: 11 pages, 3 figures, submitted to Phys. Rev. Lett
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0901.0864 Zobrazit plný text záznamu View this record from Arxiv