Influence of different onion states on magnetization reversal processes in permalloy rings

Mei Feng Lai; Ying Jiun Chen; Da Ren Liu; Chi Kuen Lo; Chia Jung Hsu; Chun Neng Liao; Chiun Peng Lee; Yi Hsun Chiu; Zung Hang Wei

doi:10.1109/TMAG.2009.2034388

Influence of different onion states on magnetization reversal processes in permalloy rings

Mei Feng Lai, Ying Jiun Chen, Da Ren Liu, Chi Kuen Lo, Chia Jung Hsu, Chun Neng Liao, Chiun Peng Lee, Yi Hsun Chiu, Zung Hang Wei^*

^*Corresponding author for this work

Department of Physics

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

8 Citations (Scopus)

Abstract

Simulation and experiment are performed to investigate the influence of onion states with different-helicity pair vortices on the magnetization reversal process. It is found that for the onion state that has pair vortices with the same helicity, flux-closure state occurs in the reversal process; for the onion state that has pair vortices with opposite helicity, flux-closure state does not occur in the reversal process, and the onion state transforms directly to the reverse onion state. In addition, notches at the same side and diagonal notches with respect to the field direction are designed on the permalloy rings to induce onion states with same-helicity pair vortices and opposite-helicity pair vortices, respectively, for the control of the three-step and two-step magnetization reversal processes.

Original language	English
Article number	5393236
Pages (from-to)	179-182
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	46
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2009.2034388
Publication status	Published - 2010 Feb

Keywords

Hysteresis
Magnetic thin films
Magnetization reversal
Permalloy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2009.2034388

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title = "Influence of different onion states on magnetization reversal processes in permalloy rings",

abstract = "Simulation and experiment are performed to investigate the influence of onion states with different-helicity pair vortices on the magnetization reversal process. It is found that for the onion state that has pair vortices with the same helicity, flux-closure state occurs in the reversal process; for the onion state that has pair vortices with opposite helicity, flux-closure state does not occur in the reversal process, and the onion state transforms directly to the reverse onion state. In addition, notches at the same side and diagonal notches with respect to the field direction are designed on the permalloy rings to induce onion states with same-helicity pair vortices and opposite-helicity pair vortices, respectively, for the control of the three-step and two-step magnetization reversal processes.",

keywords = "Hysteresis, Magnetic thin films, Magnetization reversal, Permalloy",

author = "Lai, {Mei Feng} and Chen, {Ying Jiun} and Liu, {Da Ren} and Lo, {Chi Kuen} and Hsu, {Chia Jung} and Liao, {Chun Neng} and Lee, {Chiun Peng} and Chiu, {Yi Hsun} and Wei, {Zung Hang}",

note = "Funding Information: This work was supported in part by the ROC National Science Council under Grants NSC 96-2112-M-007-032-MY3 and NSC 96-2112-M-007-036-MY3.",

year = "2010",

month = feb,

doi = "10.1109/TMAG.2009.2034388",

language = "English",

volume = "46",

pages = "179--182",

journal = "IEEE Transactions on Magnetics",

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T1 - Influence of different onion states on magnetization reversal processes in permalloy rings

AU - Lai, Mei Feng

AU - Chen, Ying Jiun

AU - Liu, Da Ren

AU - Lo, Chi Kuen

AU - Hsu, Chia Jung

AU - Liao, Chun Neng

AU - Lee, Chiun Peng

AU - Chiu, Yi Hsun

AU - Wei, Zung Hang

N1 - Funding Information: This work was supported in part by the ROC National Science Council under Grants NSC 96-2112-M-007-032-MY3 and NSC 96-2112-M-007-036-MY3.

PY - 2010/2

Y1 - 2010/2

N2 - Simulation and experiment are performed to investigate the influence of onion states with different-helicity pair vortices on the magnetization reversal process. It is found that for the onion state that has pair vortices with the same helicity, flux-closure state occurs in the reversal process; for the onion state that has pair vortices with opposite helicity, flux-closure state does not occur in the reversal process, and the onion state transforms directly to the reverse onion state. In addition, notches at the same side and diagonal notches with respect to the field direction are designed on the permalloy rings to induce onion states with same-helicity pair vortices and opposite-helicity pair vortices, respectively, for the control of the three-step and two-step magnetization reversal processes.

AB - Simulation and experiment are performed to investigate the influence of onion states with different-helicity pair vortices on the magnetization reversal process. It is found that for the onion state that has pair vortices with the same helicity, flux-closure state occurs in the reversal process; for the onion state that has pair vortices with opposite helicity, flux-closure state does not occur in the reversal process, and the onion state transforms directly to the reverse onion state. In addition, notches at the same side and diagonal notches with respect to the field direction are designed on the permalloy rings to induce onion states with same-helicity pair vortices and opposite-helicity pair vortices, respectively, for the control of the three-step and two-step magnetization reversal processes.

KW - Hysteresis

KW - Magnetic thin films

KW - Magnetization reversal

KW - Permalloy

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Influence of different onion states on magnetization reversal processes in permalloy rings

Abstract

Keywords

ASJC Scopus subject areas

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