Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet

Yuushou Hirata, Duck Ho Kim, Se Kwon Kim, Dong Kyu Lee, Se Hyeok Oh, Dae Yun Kim, Tomoe Nishimura, Takaya Okuno, Yasuhiro Futakawa, Hiroki Yoshikawa, Arata Tsukamoto, Yaroslav Tserkovnyak, Yoichi Shiota, Takahiro Moriyama, Sug Bong Choe, Kyoung Jin Lee, Teruo Ono

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 languageEnglish
JournalNature Nanotechnology
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

ferrimagnets
temperature compensation
Magnets
Angular momentum
Hall effect
Magnetic Fields
angular momentum
Temperature
Magnetic fields
magnetic fields
elongation
Elongation
bubbles
Charged particles
charged particles
conductors
Compensation and Redress
Data storage equipment
estimates
Direction compound

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

Hirata, Y., Kim, D. H., Kim, S. K., Lee, D. K., Oh, S. H., Kim, D. Y., ... Ono, T. (Accepted/In press). Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet. Nature Nanotechnology. https://doi.org/10.1038/s41565-018-0345-2

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 journalArticle

Hirata, Y, Kim, DH, Kim, SK, Lee, DK, Oh, SH, Kim, DY, Nishimura, T, Okuno, T, Futakawa, Y, Yoshikawa, H, Tsukamoto, A, Tserkovnyak, Y, Shiota, Y, Moriyama, T, Choe, SB, Lee, KJ & Ono, T 2019, 'Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet', Nature Nanotechnology. https://doi.org/10.1038/s41565-018-0345-2
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. / Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet. In: Nature Nanotechnology. 2019.
@article{5ba35cba1ca94a07a90576245e830d93,
title = "Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet",
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.",
author = "Yuushou Hirata and Kim, {Duck Ho} and Kim, {Se Kwon} and Lee, {Dong Kyu} and Oh, {Se Hyeok} and Kim, {Dae Yun} and Tomoe Nishimura and Takaya Okuno and Yasuhiro Futakawa and Hiroki Yoshikawa and Arata Tsukamoto and Yaroslav Tserkovnyak and Yoichi Shiota and Takahiro Moriyama and Choe, {Sug Bong} and Lee, {Kyoung Jin} and Teruo Ono",
year = "2019",
month = "1",
day = "1",
doi = "10.1038/s41565-018-0345-2",
language = "English",
journal = "Nature Nanotechnology",
issn = "1748-3387",
publisher = "Nature Publishing Group",

}

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 -