Magnetization Reversal for Ni Nanowires Studied by Micromagnetic Simulations

J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (02): 151-154.

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Magnetization Reversal for Ni Nanowires Studied by Micromagnetic Simulations

Nianmei Han¹⁾, Guanghua Guo^1,2)†, Lamei Zhang¹⁾, Guangfu Zhang¹⁾ and Wenbin Song ¹⁾

1) School of Physics Science and Technology, Central South University, Changsha 410083, China
2) State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

Received:2007-06-14 Revised:2007-12-27 Online:2009-03-28 Published:2009-10-10
Supported by:
the National Natural Science Foundation of China under Grant No. 60571043;
the Natural Science Foundation of Hunan Province of China under Grant No. 04JJ3078

Abstract

Abstract:

The magnetization reversal mechanisms for Ni nanowires with different diameters were investigated by micromagnetic simulations. The results show that the reversal mechanisms are significantly dependent on the diameter of wire. For very thin wires, the reversal occurs by pseudo-coherent rotation. With increasing diameter, magnetization reversal takes place via different nucleation (the transverse domain wall and the vortex domain wall) and subsequent propagation. The reason of transition from the transverse domain wall to the vortex domain wall is given by analytical studies. With further increase of the diameter, the reversal nuclear domain wall becomes tundish-shaped form. As the diameter increases, the width of wall becomes larger.

Key words: Nanowire, Micromagnetics, Magnetization reversal mechanism

Nianmei Han,Guanghua Guo,Lamei Zhang,Guangfu Zhang,Wenbin Song. Magnetization Reversal for Ni Nanowires Studied by Micromagnetic Simulations[J]. J Mater Sci Technol, 2009, 25(02): 151-154.

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Magnetization Reversal for Ni Nanowires Studied by Micromagnetic Simulations

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