The asymmetric pinning potential in domain wall velocity of ferromagnetic nanowire on miscut sapphire substrate
- Title
- The asymmetric pinning potential in domain wall velocity of ferromagnetic nanowire on miscut sapphire substrate
- Alternative Title
- 미스컷 사파이어 기판을 사용하여 강자성 나노와이어에서의 비등방성 피닝 포텐셜의 자구벽 속도 영향에 대한 연구
- Author(s)
- Weonjun Na
- DGIST Authors
- Weonjun Na ; Chun-Yeol You ; Jung-Il Hong
- Advisor
- 유천열
- Co-Advisor(s)
- Jung-Il Hong
- Issued Date
- 2023
- Awarded Date
- 2023-02-01
- Type
- Thesis
- Description
- Domain wall velocity, asymmetric pinning potential, miscut sapphire substrate
- Table Of Contents
-
Ⅰ. INTRODUCTION 1
Ⅱ. THEORATICAL BACKGROUND 2
2.1. Doman & Domain wall 2
2.1.1. Domain 2
2.1.2. Domain wall 3
2.2. Creep region DW velocity 4
2.3. Field driven DW motion 6
2.4. Sapphire Miscut Substrate 7
Ⅲ. MATERIAL&METHODS 8
3.1. Film deposition and patterning 8
3.1.1. Magnetron Sputtering 8
3.1.2. Photolithography 10
3.1.3. Etching 11
3.2. Magnetic Property Measurement 13
3.2.1. ViberationalSample Magnetometer (VSM) 13
3.3. Domain wall motion measurement 14
3.3.1. Polar-Kerr microscope 14
3.3.2. Domain wall nucleation and propagation 16
3.3.3. Define +MZ, -MZ initalization, propagation direction 18
3.3.4. In-plane angle dependence of pinning potential 20
Ⅳ. RESULTS&DISCUSSION 22
4.1. Substate Surface Evaluation 22
4.2. Magnetic properties 24
4.3. In-plane angle dependence of DW velocity 25
4.4 Comparsion of slope (α) and intercept (lnν0) on graph H-1/4- lnν 30
Ⅴ. CONCLUSION 33
- URI
-
http://hdl.handle.net/20.500.11750/45719
http://dgist.dcollection.net/common/orgView/200000652152
- Degree
- Master
- Department
- Department of Physics and Chemistry
- Publisher
- DGIST
- Related Researcher
-
-
You, Chun-Yeol
- Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
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- Files in This Item:
-
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- Appears in Collections:
- Department of Physics and Chemistry Theses Master
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