Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire

Candra Kurniawan; Dede Djuhana; Bambang Soegijono; Dong Hyun Kim

doi:10.1016/j.cap.2021.04.017

Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire

Candra Kurniawan, Dede Djuhana, Bambang Soegijono, Dong Hyun Kim

Department of Physics

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

2 Citations (Scopus)

Abstract

We report our micromagnetic simulations based on Landau-Lifshitz-Gilbert (LLG) equation for CoFeB nanowire which was exposed by sub-nanosecond magnetic pulse with varied pulse width between 100 and 1000 ps. It is found that the Walker Breakdown field (H_WB) shifted as the field pulse duration decreased and reached at the highest value in case of 100 ps pulse width, then decreased steeply with respect to the pulse width up to 400 ps. H_WB values are not significantly dependent for pulses longer than 500 ps. It is observed that, below the H_WB, the exchange energy is larger than the demagnetization energy in the wider nanowire. By energy density analysis, it is understood that the increase of H_WB values in the cases of narrower pulse width was to compensate the energy needed to move the DW.

Original language	English
Pages (from-to)	98-102
Number of pages	5
Journal	Current Applied Physics
Volume	27
DOIs	https://doi.org/10.1016/j.cap.2021.04.017
Publication status	Published - Jul 2021

Keywords

CoFeB nanowire
Domain wall
Magnetic pulse
Micromagnetics
Walker breakdown

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10.1016/j.cap.2021.04.017

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title = "Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire",

abstract = "We report our micromagnetic simulations based on Landau-Lifshitz-Gilbert (LLG) equation for CoFeB nanowire which was exposed by sub-nanosecond magnetic pulse with varied pulse width between 100 and 1000 ps. It is found that the Walker Breakdown field (HWB) shifted as the field pulse duration decreased and reached at the highest value in case of 100 ps pulse width, then decreased steeply with respect to the pulse width up to 400 ps. HWB values are not significantly dependent for pulses longer than 500 ps. It is observed that, below the HWB, the exchange energy is larger than the demagnetization energy in the wider nanowire. By energy density analysis, it is understood that the increase of HWB values in the cases of narrower pulse width was to compensate the energy needed to move the DW.",

keywords = "CoFeB nanowire, Domain wall, Magnetic pulse, Micromagnetics, Walker breakdown",

author = "Candra Kurniawan and Dede Djuhana and Bambang Soegijono and Kim, {Dong Hyun}",

note = "Funding Information: This work was funded by Hibah Penelitian Disertasi Doktor (Doctoral Dissertation Research Grant) year 2020 No. NKB-407/UN2.RST/HKP.05.00/2020 with addendum No. NKB-3006/UN2.RST/HKP.05.00/2020 through DRPM Universitas Indonesia. I would like to acknowledge the Saintek Scholarship year 2018 from the Ministry of Research, Technology and Higher Education , the Republic of Indonesia, for scholarship support. We would also like to thank Ahmad Yani, M.Si, for conducting the preliminary study. Publisher Copyright: {\textcopyright} 2021 Korean Physical Society",

year = "2021",

month = jul,

doi = "10.1016/j.cap.2021.04.017",

language = "English",

volume = "27",

pages = "98--102",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier",

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TY - JOUR

T1 - Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire

AU - Kurniawan, Candra

AU - Djuhana, Dede

AU - Soegijono, Bambang

AU - Kim, Dong Hyun

N1 - Funding Information: This work was funded by Hibah Penelitian Disertasi Doktor (Doctoral Dissertation Research Grant) year 2020 No. NKB-407/UN2.RST/HKP.05.00/2020 with addendum No. NKB-3006/UN2.RST/HKP.05.00/2020 through DRPM Universitas Indonesia. I would like to acknowledge the Saintek Scholarship year 2018 from the Ministry of Research, Technology and Higher Education , the Republic of Indonesia, for scholarship support. We would also like to thank Ahmad Yani, M.Si, for conducting the preliminary study. Publisher Copyright: © 2021 Korean Physical Society

PY - 2021/7

Y1 - 2021/7

N2 - We report our micromagnetic simulations based on Landau-Lifshitz-Gilbert (LLG) equation for CoFeB nanowire which was exposed by sub-nanosecond magnetic pulse with varied pulse width between 100 and 1000 ps. It is found that the Walker Breakdown field (HWB) shifted as the field pulse duration decreased and reached at the highest value in case of 100 ps pulse width, then decreased steeply with respect to the pulse width up to 400 ps. HWB values are not significantly dependent for pulses longer than 500 ps. It is observed that, below the HWB, the exchange energy is larger than the demagnetization energy in the wider nanowire. By energy density analysis, it is understood that the increase of HWB values in the cases of narrower pulse width was to compensate the energy needed to move the DW.

AB - We report our micromagnetic simulations based on Landau-Lifshitz-Gilbert (LLG) equation for CoFeB nanowire which was exposed by sub-nanosecond magnetic pulse with varied pulse width between 100 and 1000 ps. It is found that the Walker Breakdown field (HWB) shifted as the field pulse duration decreased and reached at the highest value in case of 100 ps pulse width, then decreased steeply with respect to the pulse width up to 400 ps. HWB values are not significantly dependent for pulses longer than 500 ps. It is observed that, below the HWB, the exchange energy is larger than the demagnetization energy in the wider nanowire. By energy density analysis, it is understood that the increase of HWB values in the cases of narrower pulse width was to compensate the energy needed to move the DW.

KW - CoFeB nanowire

KW - Domain wall

KW - Magnetic pulse

KW - Micromagnetics

KW - Walker breakdown

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DO - 10.1016/j.cap.2021.04.017

M3 - Article

AN - SCOPUS:85105697785

SN - 1567-1739

VL - 27

SP - 98

EP - 102

JO - Current Applied Physics

JF - Current Applied Physics

ER -

Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire

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