Nonuniform micromagnetic states in thin circular dots

Zung Hang Wei; Mei Feng Lai; Ching Ray Chang; N. A. Usov; J. C. Wu; Jun Yang Lai

doi:10.1016/j.jmmm.2004.04.003

Nonuniform micromagnetic states in thin circular dots

Zung Hang Wei, Mei Feng Lai, Ching Ray Chang, N. A. Usov, J. C. Wu, Jun Yang Lai

Department of Physics

Research output: Contribution to journal › Conference article

4 Citations (Scopus)

Abstract

Micromagnetic states are strongly related to sizes of nano-dots. The quasiuniform state becomes unstable and transforms to a new nonuniform state as the diameter of the permalloy circular dot exceeds some critical size. The magnetization curvature increases gradually as the diameter increases. Finally, when the diameter is larger than another critical size, the new nonuniform state becomes unstable and a vortex enters the particle. Hence the new nonuniform state plays an intermediate role in the evolution from the quasiuniform state to the vortex state as the diameter increases.

Original language	English
Pages (from-to)	11-14
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	282
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jmmm.2004.04.003
Publication status	Published - 2004 Nov 1
Event	International Symposium on Advanced Magnetic Technologies - Taipei, Taiwan Duration: 2003 Nov 13 → 2003 Nov 16

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All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

Wei, Z. H., Lai, M. F., Chang, C. R., Usov, N. A., Wu, J. C., & Lai, J. Y. (2004). Nonuniform micromagnetic states in thin circular dots. Journal of Magnetism and Magnetic Materials, 282(1-3), 11-14. https://doi.org/10.1016/j.jmmm.2004.04.003

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abstract = "Micromagnetic states are strongly related to sizes of nano-dots. The quasiuniform state becomes unstable and transforms to a new nonuniform state as the diameter of the permalloy circular dot exceeds some critical size. The magnetization curvature increases gradually as the diameter increases. Finally, when the diameter is larger than another critical size, the new nonuniform state becomes unstable and a vortex enters the particle. Hence the new nonuniform state plays an intermediate role in the evolution from the quasiuniform state to the vortex state as the diameter increases.",

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AU - Wei, Zung Hang

AU - Lai, Mei Feng

AU - Chang, Ching Ray

AU - Usov, N. A.

AU - Wu, J. C.

AU - Lai, Jun Yang

PY - 2004/11/1

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N2 - Micromagnetic states are strongly related to sizes of nano-dots. The quasiuniform state becomes unstable and transforms to a new nonuniform state as the diameter of the permalloy circular dot exceeds some critical size. The magnetization curvature increases gradually as the diameter increases. Finally, when the diameter is larger than another critical size, the new nonuniform state becomes unstable and a vortex enters the particle. Hence the new nonuniform state plays an intermediate role in the evolution from the quasiuniform state to the vortex state as the diameter increases.

AB - Micromagnetic states are strongly related to sizes of nano-dots. The quasiuniform state becomes unstable and transforms to a new nonuniform state as the diameter of the permalloy circular dot exceeds some critical size. The magnetization curvature increases gradually as the diameter increases. Finally, when the diameter is larger than another critical size, the new nonuniform state becomes unstable and a vortex enters the particle. Hence the new nonuniform state plays an intermediate role in the evolution from the quasiuniform state to the vortex state as the diameter increases.

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EP - 14

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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Access to Document

10.1016/j.jmmm.2004.04.003