Current-excited magnetization dynamics in narrow ferromagnetic wires

Details Current-excited magnetization dynamics in narrow ferromagnetic wires Current-excited magnetization dynamics in narrow ferromagnetic wires

2006-06-21

arxiv.org/abs/cond-mat/0606547v1

Jpn.J.Appl.Phys. 45 L683 (2006).

Physics

Condensed Matter

Materials Science

11 pages, 2 figures, 3 videos, accepted in Japanese Journal of Applied Physics (Express Letters)

Scientific paper

10.1143/JJAP.45.L683

We investigate the current-excited magnetization dynamics in a narrow ferromagnetic Permalloy wire by means of Lorentz microscopy, together with the results of simultaneous transport measurements. A detailed structural evolution of the magnetization is presented as a function of the applied current density. Local structural deformation, bidirectional displacement, and magnetization reversal are found below the Curie temperature with increasing the current density. We discuss probable mechanisms of observed features of the current-excited magnetization dynamics.

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