Abstract
In the presence of a magnetic field, the flow of charged particles in a conductor is deflected from the direction of the applied force, which gives rise to the ordinary Hall effect. Analogously, moving skyrmions with non-zero topological charges and finite fictitious magnetic fields exhibit the skyrmion Hall effect, which is detrimental for applications such as skyrmion racetrack memory. It was predicted that the skyrmion Hall effect vanishes for antiferromagnetic skyrmions because their fictitious magnetic field, proportional to net spin density, is zero. Here we investigate the current-driven transverse elongation of pinned ferrimagnetic bubbles. We estimate the skyrmion Hall effect from the angle between the current and the bubble elongation directions. The angle and, hence, the skyrmion Hall effect vanishes at the angular momentum compensation temperature where the net spin density vanishes. Furthermore, our study establishes a direct connection between the fictitious magnetic field and the spin density.
| Original language | English |
|---|---|
| Journal | Nature Nanotechnology |
| DOIs | |
| Publication status | Accepted/In press - 2019 Jan 1 |
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ASJC Scopus subject areas
- Bioengineering
- Atomic and Molecular Physics, and Optics
- Biomedical Engineering
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet. / Hirata, Yuushou; Kim, Duck Ho; Kim, Se Kwon; Lee, Dong Kyu; Oh, Se Hyeok; Kim, Dae Yun; Nishimura, Tomoe; Okuno, Takaya; Futakawa, Yasuhiro; Yoshikawa, Hiroki; Tsukamoto, Arata; Tserkovnyak, Yaroslav; Shiota, Yoichi; Moriyama, Takahiro; Choe, Sug Bong; Lee, Kyoung Jin; Ono, Teruo.
In: Nature Nanotechnology, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet
AU - Hirata, Yuushou
AU - Kim, Duck Ho
AU - Kim, Se Kwon
AU - Lee, Dong Kyu
AU - Oh, Se Hyeok
AU - Kim, Dae Yun
AU - Nishimura, Tomoe
AU - Okuno, Takaya
AU - Futakawa, Yasuhiro
AU - Yoshikawa, Hiroki
AU - Tsukamoto, Arata
AU - Tserkovnyak, Yaroslav
AU - Shiota, Yoichi
AU - Moriyama, Takahiro
AU - Choe, Sug Bong
AU - Lee, Kyoung Jin
AU - Ono, Teruo
PY - 2019/1/1
Y1 - 2019/1/1
N2 - In the presence of a magnetic field, the flow of charged particles in a conductor is deflected from the direction of the applied force, which gives rise to the ordinary Hall effect. Analogously, moving skyrmions with non-zero topological charges and finite fictitious magnetic fields exhibit the skyrmion Hall effect, which is detrimental for applications such as skyrmion racetrack memory. It was predicted that the skyrmion Hall effect vanishes for antiferromagnetic skyrmions because their fictitious magnetic field, proportional to net spin density, is zero. Here we investigate the current-driven transverse elongation of pinned ferrimagnetic bubbles. We estimate the skyrmion Hall effect from the angle between the current and the bubble elongation directions. The angle and, hence, the skyrmion Hall effect vanishes at the angular momentum compensation temperature where the net spin density vanishes. Furthermore, our study establishes a direct connection between the fictitious magnetic field and the spin density.
AB - In the presence of a magnetic field, the flow of charged particles in a conductor is deflected from the direction of the applied force, which gives rise to the ordinary Hall effect. Analogously, moving skyrmions with non-zero topological charges and finite fictitious magnetic fields exhibit the skyrmion Hall effect, which is detrimental for applications such as skyrmion racetrack memory. It was predicted that the skyrmion Hall effect vanishes for antiferromagnetic skyrmions because their fictitious magnetic field, proportional to net spin density, is zero. Here we investigate the current-driven transverse elongation of pinned ferrimagnetic bubbles. We estimate the skyrmion Hall effect from the angle between the current and the bubble elongation directions. The angle and, hence, the skyrmion Hall effect vanishes at the angular momentum compensation temperature where the net spin density vanishes. Furthermore, our study establishes a direct connection between the fictitious magnetic field and the spin density.
UR - http://www.scopus.com/inward/record.url?scp=85060349707&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060349707&partnerID=8YFLogxK
U2 - 10.1038/s41565-018-0345-2
DO - 10.1038/s41565-018-0345-2
M3 - Article
C2 - 30664756
AN - SCOPUS:85060349707
JO - Nature Nanotechnology
JF - Nature Nanotechnology
SN - 1748-3387
ER -