期刊
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS
卷 45, 期 24-28, 页码 L683-L685出版社
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.45.L683
关键词
current-driven magnetization dynamics; magnetic domain wall; spin torque; Permalloy wire; Lorentz microscopy; electron holography
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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