We have explored a fundamental phenomenon of magnetic domain wall collision in ferromagnetic nanowires using a micromagnetic simulation. With a systematic variation of an applied field strength, the domain wall collision phenomenon is observed around the Walker breakdown. Collision dynamics is found to mainly depend on domain wall inner structures. In the case of antiparallel transverse walls, it is found that the domain wall structure is preserved even after the collision, while parallel transverse walls experience multiple collisions with switching transverse components of colliding domain walls. After the Walker breakdown, collision of two domain walls comprises of creation and annihilation of a vortex and an antivortex. It is revealed that the collision dynamics of domain walls with an antivortex structure becomes strikingly distinctive depending on the relative direction of two colliding antivortex cores. Collision of vortex walls is observed to be associated with a complex interaction among vortex, antivortex, and even a tiny unreversed magnetic domain.
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15 November 2009
Research Article|
November 30 2009
Magnetic domain wall collision around the Walker breakdown in ferromagnetic nanowires
Dede Djuhana;
Dede Djuhana
Department of Physics,
Chungbuk National University
, Cheongju 361-763, South Korea
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Hong-Guang Piao;
Hong-Guang Piao
Department of Physics,
Chungbuk National University
, Cheongju 361-763, South Korea
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Seong-Cho Yu;
Seong-Cho Yu
Department of Physics,
Chungbuk National University
, Cheongju 361-763, South Korea
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Suhk Kun Oh;
Suhk Kun Oh
Department of Physics,
Chungbuk National University
, Cheongju 361-763, South Korea
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Dong-Hyun Kim
Dong-Hyun Kim
a)
Department of Physics,
Chungbuk National University
, Cheongju 361-763, South Korea
Search for other works by this author on:
Dede Djuhana
Hong-Guang Piao
Seong-Cho Yu
Suhk Kun Oh
Dong-Hyun Kim
a)
Department of Physics,
Chungbuk National University
, Cheongju 361-763, South Korea
a)
Electronic mail: [email protected].
J. Appl. Phys. 106, 103926 (2009)
Article history
Received:
June 17 2009
Accepted:
October 23 2009
Citation
Dede Djuhana, Hong-Guang Piao, Seong-Cho Yu, Suhk Kun Oh, Dong-Hyun Kim; Magnetic domain wall collision around the Walker breakdown in ferromagnetic nanowires. J. Appl. Phys. 15 November 2009; 106 (10): 103926. https://doi.org/10.1063/1.3264642
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