Abstract
In this study, we investigated the domain wall propagation behavior in FePt and FePd nanowires by micromagnetic simulation based on LLG equation. A rectangular shape nanowire model was generated with a fixed length of 2000 nm and varied thicknesses of 2.5 nm and 5 nm. The wire widths were varied of 50 nm, 100 nm, and 150 nm. The 500 ps length of magnetic-pulse was applied in-plane to a transverse type domain wall. We observed the Walker Breakdown field (H WB), which means the maximum domain wall velocity before it was abruptly decreased. The transverse DW structure was maintained below H WB while vortex/antivortex wall structure was formed in the higher magnetic field. Interestingly, the H WB value of both FePt and FePd were decreased as the width and thickness of the nanowires increased. We have also analyzed the changing of the demagnetization and exchange energy for the domain wall structure transition from transverse wall to vortex/anti-vortex wall.
Original language | English |
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Article number | 012017 |
Journal | IOP Conference Series: Materials Science and Engineering |
Volume | 553 |
Issue number | 1 |
DOIs | |
Publication status | Published - 12 Nov 2019 |
Event | 19th International Union of Materials Research Societies - International Conference in Asia, IUMRS-ICA 2018 - Bali, Indonesia Duration: 30 Oct 2018 → 2 Nov 2018 |
Keywords
- domain wall
- micromagnetic
- nanowire
- transverse wall
- vortex wall
- Walker Breakdown