Domain wall energy in the trapezoid shaped wire with perpendicular magnetic anisotropy system
- Title
- Domain wall energy in the trapezoid shaped wire with perpendicular magnetic anisotropy system
- Alternative Title
- 수직 자기 이방성을 갖는 사다리꼴 모양의 도선에서의 자구벽 에너지 분석
- Author(s)
- Dongryul Kim
- DGIST Authors
- Dongryul Kim ; You Chun-Yeol ; Hong Jung-Ill
- Advisor
- 유천열
- Co-Advisor(s)
- Hong Jung-Ill
- Issued Date
- 2021
- Awarded Date
- 2021/02
- Type
- Thesis
- Table Of Contents
-
1. INTRODUCTION 1
2. THEORITICAL BACKGROUND 3
2.1. Energies of the ferromagnetic system 3
2.1.1. Magnetostatic energy 3
2.1.2. Zeeman energy 4
2.1.3. Exchange interaction energy 4
2.1.4. Zeeman energy 5
2.1.5. DW energy and thickness 5
2.2. Perpendicular magnetic anisotropy (PMA) and in-plane magnetic anisotropy (IMA) 7
2.3. DW type in PMA system 8
2.4. Field driven DW motion 9
2.5. Landau-Lifshitz and Gilbert eqation (LLG equation) with DW dynamics 10
2.6. Arc shape DW 12
2.7. Polar-Kerr microscope 13
3. DEVICE FABRICATION 16
3.1. DC magnetron sputtering 16
3.2. Photolithography 18
3.3. Ion beam milling system 19
4. RESULT & DISCUSSION 20
4.1. Film characteristic and structure 20
4.2. Heff calculation in the trapezoidal system 21
4.3. DW velocity observation in the trapezoidal system 25
4.4. Heff increase according to reduing the size of trapezoidal wire 32
5. CONCLUSION 33
References 34
요약문 36
- URI
-
http://dgist.dcollection.net/common/orgView/200000366180
http://hdl.handle.net/20.500.11750/16725
- Degree
- Master
- Department
- Emerging Materials Science
- 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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