Abstract
The dynamics of a magnetic domain wall (DW) under a transverse magnetic field Hy are investigated in two-dimensional (2D) Co/Ni microstrips, where an interfacial Dzyaloshinskii-Moriya interaction (DMI) exists with DMI vector D lying in +y direction. The DW velocity exhibits asymmetric behavior for ±Hy; that is, the DW velocity becomes faster when Hy is applied antiparallel to D. The key experimental results are reproduced in a 2D micromagnetic simulation, which reveals that the interfacial DMI suppresses the periodic change of the average DW angle φ even above the Walker breakdown and that Hy changes φ, resulting in a velocity asymmetry. This suggests that the 2D DW motion, despite its microscopic complexity, simply depends on the average angle of the DW and thus can be described using a one-dimensional soliton model. These findings provide insight into the magnetic DW dynamics in 2D systems, which are important for emerging spin-orbitronic applications.
| Original language | English |
|---|---|
| Article number | 032504 |
| Journal | APL Materials |
| Volume | 4 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2016 Mar 1 |
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ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
Cite this
Observation of asymmetry in domain wall velocity under transverse magnetic field. / Kim, K. J.; Yoshimura, Y.; Okuno, T.; Moriyama, T.; Lee, S. W.; Lee, Kyoung Jin; Nakatani, Y.; Ono, T.
In: APL Materials, Vol. 4, No. 3, 032504, 01.03.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Observation of asymmetry in domain wall velocity under transverse magnetic field
AU - Kim, K. J.
AU - Yoshimura, Y.
AU - Okuno, T.
AU - Moriyama, T.
AU - Lee, S. W.
AU - Lee, Kyoung Jin
AU - Nakatani, Y.
AU - Ono, T.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The dynamics of a magnetic domain wall (DW) under a transverse magnetic field Hy are investigated in two-dimensional (2D) Co/Ni microstrips, where an interfacial Dzyaloshinskii-Moriya interaction (DMI) exists with DMI vector D lying in +y direction. The DW velocity exhibits asymmetric behavior for ±Hy; that is, the DW velocity becomes faster when Hy is applied antiparallel to D. The key experimental results are reproduced in a 2D micromagnetic simulation, which reveals that the interfacial DMI suppresses the periodic change of the average DW angle φ even above the Walker breakdown and that Hy changes φ, resulting in a velocity asymmetry. This suggests that the 2D DW motion, despite its microscopic complexity, simply depends on the average angle of the DW and thus can be described using a one-dimensional soliton model. These findings provide insight into the magnetic DW dynamics in 2D systems, which are important for emerging spin-orbitronic applications.
AB - The dynamics of a magnetic domain wall (DW) under a transverse magnetic field Hy are investigated in two-dimensional (2D) Co/Ni microstrips, where an interfacial Dzyaloshinskii-Moriya interaction (DMI) exists with DMI vector D lying in +y direction. The DW velocity exhibits asymmetric behavior for ±Hy; that is, the DW velocity becomes faster when Hy is applied antiparallel to D. The key experimental results are reproduced in a 2D micromagnetic simulation, which reveals that the interfacial DMI suppresses the periodic change of the average DW angle φ even above the Walker breakdown and that Hy changes φ, resulting in a velocity asymmetry. This suggests that the 2D DW motion, despite its microscopic complexity, simply depends on the average angle of the DW and thus can be described using a one-dimensional soliton model. These findings provide insight into the magnetic DW dynamics in 2D systems, which are important for emerging spin-orbitronic applications.
UR - http://www.scopus.com/inward/record.url?scp=84963593154&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84963593154&partnerID=8YFLogxK
U2 - 10.1063/1.4944897
DO - 10.1063/1.4944897
M3 - Article
AN - SCOPUS:84963593154
VL - 4
JO - APL Materials
JF - APL Materials
SN - 2166-532X
IS - 3
M1 - 032504
ER -