Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 유천열 | - |
| dc.contributor.author | Hyeong-Joo Seo | - |
| dc.date.accessioned | 2023-03-22T19:57:51Z | - |
| dc.date.available | 2024-02-28T06:00:28Z | - |
| dc.date.issued | 2023 | - |
| dc.identifier.uri | http://hdl.handle.net/20.500.11750/45774 | - |
| dc.identifier.uri | http://dgist.dcollection.net/common/orgView/200000652296 | - |
| dc.description | Spin-orbit torque, Field-free magnetization switching, DMI, non-uniform current density, Oersted field, 수직 자기 이방성, 스핀 궤도 토크, DM 상호작용, Oersted 자기장, 무자기장 스위칭 | - |
| dc.description.tableofcontents | I. Introduction 1 II. Theoretical background 3 2.1 Spin-orbit torque 3 2.1.1 Spin-transfer torque (STT) and spin-orbit torque (SOT) magnetization switching 4 2.1.2 Field-free magnetization switching 4 2.2 Dzyaloshinskii-Moriya interaction 5 2.3 Electrical measurement based on anomalous Hall effect 7 III. Materials & Methods 8 3.1 Sample preparation 8 3.1.1 Magnetron Sputtering 8 3.1.2 Photolithography 10 3.1.3 Ion beam milling 11 3.2 Magnetic property measurement 12 3.2.1 Vibrational Sample Magnetometer (VSM) 12 3.2.2 Generalized Sucksmith-Thompson (GST) method 13 3.2.3 Brillouin light scattering (BLS) spectroscopy 14 3.3 Magnetization switching measurement 16 3.3.1 SOT induced magnetization switching measurement 16 3.3.2 External out-of-plane field induced magnetization switching measurement 16 3.4 Magneto-optic Kerr microscope (MOKE) 17 IV. Results and discussion 18 4.1 Sample geometry 18 4.2 Magnetic properties 20 4.3 Field-free & Field-assisted magnetization switching via electrical measurement 22 4.4 Magnetization switching measurement via Kerr microcope 24 4.5 Perpendicular external field induced magnetization switching measurement 26 4.6 Verifying the origin of field-free magnetization switching in our experiment 30 4.6.1 Non-uniform current density distribution 30 4.6.2 Tilted magnetization at edge of the structure (DMI) 32 4.6.3 Oersted field 34 V. Conclusion 37 VI. References 38 |
- |
| dc.format.extent | 41 | - |
| dc.language | eng | - |
| dc.publisher | DGIST | - |
| dc.title | Field-free magnetization switching in unconventional Hall bar system | - |
| dc.title.alternative | 특수한 홀 바 시스템을 사용한 무-자기장 자화 스위칭 관찰 | - |
| dc.type | Thesis | - |
| dc.identifier.doi | 10.22677/THESIS.200000652296 | - |
| dc.description.degree | Master | - |
| dc.contributor.department | Department of Physics and Chemistry | - |
| dc.contributor.coadvisor | Jung-Il Hong | - |
| dc.date.awarded | 2023-02-01 | - |
| dc.publisher.location | Daegu | - |
| dc.description.database | dCollection | - |
| dc.citation | XT.MM 서94 202302 | - |
| dc.date.accepted | 2023-03-21 | - |
| dc.contributor.alternativeDepartment | 화학물리학과 | - |
| dc.subject.keyword | Spin-orbit torque | - |
| dc.subject.keyword | Field-free magnetization switching | - |
| dc.subject.keyword | DMI | - |
| dc.subject.keyword | non-uniform current density | - |
| dc.subject.keyword | Oersted field | - |
| dc.subject.keyword | 수직 자기 이방성 | - |
| dc.subject.keyword | 스핀 궤도 토크 | - |
| dc.subject.keyword | DM 상호작용 | - |
| dc.subject.keyword | Oersted 자기장 | - |
| dc.subject.keyword | 무자기장 스위칭 | - |
| dc.contributor.affiliatedAuthor | Hyeong-Joo Seo | - |
| dc.contributor.affiliatedAuthor | Chun-Yeol You | - |
| dc.contributor.affiliatedAuthor | Jung-Il Hong | - |
| dc.contributor.alternativeName | 서형주 | - |
| dc.contributor.alternativeName | Chun-Yeol You | - |
| dc.contributor.alternativeName | 홍정일 | - |
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