Control of the Magnetic Properties by Nitrogen Incorporation in CoPt Layers of CoPt/TiN Heterostructures
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- Material Type
- 博士論文
- Author/Editor
- Petrus, CaesarioCaesario, Petrus
- Author Heading
- Publication Date
- 2019-09
- Publication Date (W3CDTF)
- 2019-09
- Degree Grantor
- 東京工業大学
- Date Granted
- 2019-09-20
- Date Granted (W3CDTF)
- 2019-09-20
- Dissertation Number
- 甲第11287号
- Degree Type
- 博士(工学)
- Conferring No. (Dissertation)
- 甲第11287号
- Text Language Code
- eng
- Target Audience
- 一般
- Note (General)
- This study focuses on the fabrication of magnetic recording media oriented CoPt thin films with perpendicular magnetic anisotropy and ease of writability. It has beenfound that Nitrogen gas incorporation during the deposition leads to an improvement in perpendicular coercivity by magnitude of 10 and the reduction in orderingtemperature by 200 C. The increased number of vacancies inside the CoPt lattice is believed to be improving the diffusion speed of Co and Pt atoms during the orderingtransformation. On the other hand, when depositing CoPt films on TiN/MgO(100)underlayer, a good PMA has been observed at 400 oC. It has been assumed thatthe lattice mismatch between TiN and CoPt strains the lattice of A1-CoPt, breaking the symmetry and giving rise to high PMA. Finally, by coupling a magnetically soft CoPt layer on top of the magnetically hard CoPt layer, a 50% reduction in switching field has been achieved in a relatively simple equipment. This study shows agood method to manufacture CoPt films for future high density magnetic recording media.identifier:oai:t2r2.star.titech.ac.jp:50485964
- Persistent ID (NDL)
- info:ndljp/pid/11671929
- Collection
- Collection (Materials For Handicapped People:1)
- Collection (particular)
- 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
- Acquisition Basis
- 博士論文（自動収集）
- Date Accepted (W3CDTF)
- 2021-05-16T23:51:55+09:00
- Format (IMT)
- application/pdf
- Access Restrictions
- 国立国会図書館内限定公開
- Service for the Digitized Contents Transmission Service
- 図書館・個人送信対象外
- Availability of remote photoduplication service
- 可
- Periodical Title (URI)
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館デジタルコレクション