Vertical bistable switching of spin vortex in a circular magnetic dot

N. Kikuchi; S. Okamoto; O. Kitakami; Y. Shimada; S. G. Kim; Y. Otani; K. Fukamichi

doi:10.1063/1.1416132

Vertical bistable switching of spin vortex in a circular magnetic dot

N. Kikuchi, S. Okamoto, O. Kitakami, Y. Shimada, S. G. Kim, Y. Otani, K. Fukamichi

Division of Inorganic Material Research

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

68 Citations (Scopus)

Abstract

We have investigated switching behaviors of a spin-vortex core in circular magnetic dots to evaluate them as a new candidate for magnetic memory elements. The spin-vortex core with the lateral dimension of exchange length can take two possible states with spins around the dot center directing either up- or downward. These two spin configurations are very stable and their polarities can be switched by a large vertical field. The mean switching field reaches about 2.5 kOe for Ni₈₀Fe₂₀ dots with 1 μm in diameter and 80 nm in height. This result could open the way for developing a new bistable magnetic memory element utilizing the spin vortex.

Original language	English
Pages (from-to)	6548-6549
Number of pages	2
Journal	Journal of Applied Physics
Volume	90
Issue number	12
DOIs	https://doi.org/10.1063/1.1416132
Publication status	Published - 2001 Dec 15

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Kikuchi, N.

AU - Okamoto, S.

AU - Kitakami, O.

AU - Shimada, Y.

AU - Kim, S. G.

AU - Otani, Y.

AU - Fukamichi, K.

PY - 2001/12/15

Y1 - 2001/12/15

N2 - We have investigated switching behaviors of a spin-vortex core in circular magnetic dots to evaluate them as a new candidate for magnetic memory elements. The spin-vortex core with the lateral dimension of exchange length can take two possible states with spins around the dot center directing either up- or downward. These two spin configurations are very stable and their polarities can be switched by a large vertical field. The mean switching field reaches about 2.5 kOe for Ni80Fe20 dots with 1 μm in diameter and 80 nm in height. This result could open the way for developing a new bistable magnetic memory element utilizing the spin vortex.

AB - We have investigated switching behaviors of a spin-vortex core in circular magnetic dots to evaluate them as a new candidate for magnetic memory elements. The spin-vortex core with the lateral dimension of exchange length can take two possible states with spins around the dot center directing either up- or downward. These two spin configurations are very stable and their polarities can be switched by a large vertical field. The mean switching field reaches about 2.5 kOe for Ni80Fe20 dots with 1 μm in diameter and 80 nm in height. This result could open the way for developing a new bistable magnetic memory element utilizing the spin vortex.

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Vertical bistable switching of spin vortex in a circular magnetic dot

Abstract

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