Role of Boron Content in CoFeB Thin Films on the Microstructure and Magnetic Exchange Interactions
- Title
- Role of Boron Content in CoFeB Thin Films on the Microstructure and Magnetic Exchange Interactions
- Author(s)
- Jun-Su Kim
- DGIST Authors
- Jun-Su Kim ; Chun-Yeol You ; June-Seo Kim
- Advisor
- 유천열
- Co-Advisor(s)
- June-Seo Kim
- Issued Date
- 2024
- Awarded Date
- 2024-02-01
- Type
- Thesis
- Description
- CoFeB;Exchange stiffness constant (Aex);Interfacial Dzyaloshinskii-Moriya interaction (iDMI);Brillouin light scattering (BLS)
- Table Of Contents
-
Ⅰ. Introduction 1
Ⅱ. Theorical Background 5
2.1. Energies in magnetic system 6
2.1.1. Heisenberg exchange interaction 6
2.1.2. Dzyaloshinskii-Moriya interaction 7
2.2.3. Shape anisotropy 8
2.2.4. Interfacial magnetic anisotropy 8
2.2.5. Perpendicular magnetic anisotropy 9
2.3.6. Zeeman energy 9
2.2. Brillouin light scattering (BLS) 10
2.2.1. Landau-Lifshitz-Gilbert (LLG) equation 10
2.2.2. Spin wave 12
2.2.3. Equations for spin wave modes in the magnetic thin films 14
2.2.4. Inelastic scattered light 16
2.2.5. Brillouin light scattering 17
Ⅲ. Experimental Techniques 18
3.1. Thin Film deposition 19
3.2. Brillouin light scattering spectroscopy (BLS) 21
3.2.1. Single Fabry-Pérot interferometer (FPI) 21
3.3.2. Tandem Fabry-Pérot interferometer (FPI) 24
Ⅳ. Research Theme 1 26
4.1. Overview 27
4.2. Materials and Methods 27
4.3. Results and discussion 31
4.4. Conclusion 42
4.5. Appendix 43
Ⅴ. Research Theme 2 53
5.1. Overview 54
5.2. Materials and Methods 56
5.3. Results and discussion 57
5.4. Conclusion 58
5.5. Appendix 73
Ⅶ. Reference 86
- URI
-
http://hdl.handle.net/20.500.11750/48018
http://dgist.dcollection.net/common/orgView/200000725255
- Degree
- Doctor
- 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:
-
There are no files associated with this item.
- Appears in Collections:
- Department of Physics and Chemistry Theses Ph.D.
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