Spontaneous domain wall motion at zero external magnetic field in ferromagnetic nanowire

Dede Djuhana; Hong Guang Piao; Je Ho Shim; Sang Hyuk Lee; Su Hyeong Jun; Seong Cho Yu; Suhk Kun Oh; Dong Hyun Kim

doi:10.1109/TMAG.2009.2032139

Spontaneous domain wall motion at zero external magnetic field in ferromagnetic nanowire

Dede Djuhana, Hong Guang Piao, Je Ho Shim, Sang Hyuk Lee, Su Hyeong Jun, Seong Cho Yu, Suhk Kun Oh, Dong Hyun Kim

Department of Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We have explored a spontaneous domain wall motion in ferromagnetic nanowire at zero external magnetic field by means of micromagnetic simulation. Very interestingly, even with no external magnetic field, a spontaneous domain wall motion is observed with a speed about few tens of m/s, which is significant and not negligible in analysis of the domain wall dynamics on nanowires. The spontaneous zero-field wall motion is explained based on the minimization condition of the magnetostatic energy, preferring to have a wire magnetically saturated. Average speed of the spontaneous wall motion is found to increase as the wire thickness increases.

Original language	English
Article number	5393126
Pages (from-to)	217-219
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	46
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2009.2032139
Publication status	Published - 1 Feb 2010

Keywords

Ferromagnetic wire
Magnetostatic energy
Micromagnetic simulation
Spontaneous domain wall motion

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AU - Shim, Je Ho

AU - Lee, Sang Hyuk

AU - Jun, Su Hyeong

AU - Yu, Seong Cho

AU - Oh, Suhk Kun

AU - Kim, Dong Hyun

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AB - We have explored a spontaneous domain wall motion in ferromagnetic nanowire at zero external magnetic field by means of micromagnetic simulation. Very interestingly, even with no external magnetic field, a spontaneous domain wall motion is observed with a speed about few tens of m/s, which is significant and not negligible in analysis of the domain wall dynamics on nanowires. The spontaneous zero-field wall motion is explained based on the minimization condition of the magnetostatic energy, preferring to have a wire magnetically saturated. Average speed of the spontaneous wall motion is found to increase as the wire thickness increases.

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Spontaneous domain wall motion at zero external magnetic field in ferromagnetic nanowire

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Keywords

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