Magnetization reversal of the transverse domain wall confined between two clusters of magnetic impurities in a ferromagnetic planar nanowire

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:419

Article

Toscano, D.¹  Leonel, S. A.¹  Coura, P. Z.¹  Sato, F.¹  Costa, B. V.²  Vazquez, M.³ 

[1] Univ Fed Juiz de Fora, Dept Fis, Lab Simulacao Computat, BR-36036330 Juiz De Fora, MG, Brazil

[2] Univ Fed Minas Gerais, Dept Fis, Lab Simulacao, BR-30123970 Belo Horizonte, MG, Brazil

[3] CSIC, Inst Ciencia Mat Madrid, Plaza Murillo 2, E-28049 Madrid, Spain

关键词: Rectangular nanowire;    Transverse domain wall;    Polarity switching;    Magnetic impurities;    Micromagnetic simulation;    Magnetization dynamics;   

DOI  :  10.1016/j.jmmm.2016.05.107

来源: Elsevier

【 摘 要 】

Numerical simulations have been used to investigate the polarity reversal of the transverse domain wall in rectangular magnetic nanowires and the stabilization of the domain wall position after occurring the polarity reversal. In order to control the wall position we have considered two clusters of magnetic impurities, identical and equidistant from the nanowire width axis. Traps of pinning and blocking for the transverse domain wall can be originated from magnetic impurities, consisting of a local variation of the exchange constant. Under suitable excitation amplitudes it is possible to switch the polarity of the transverse domain wall by applying a nanosecond axial magnetic field pulse in a fast and controllable way. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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