| 講演抄録／キーワード |
| 講演名 |
2021-06-10 16:15
(Bi,La)(Fe1-xCox)O3強磁性・強誘電薄膜における垂直磁気異方性と磁気Kerr効果のCo置換量依存性
○尾関拓海・山本大地・江川元太・吉村 哲（秋田大） |
| 抄録 |
（和） |
強磁性・強誘電材料を次世代磁気記録デバイスである磁性細線メモリの記録素子へ応用するには高い飽和磁化と垂直磁気異方性が必要とされることから，BiFeO3系強磁性・強誘電薄膜において，A サイトのBi の元素置換のみならず，BサイトのFeの元素置換効果の検討を，Co置換量を0〜28 at%の間で変化させることで行った．その結果，Co置換量が多いほど大きい飽和磁化と垂直磁気異方性が得られた．また，電界駆動型の次々世代光変調素子への応用の観点から，これらの薄膜の磁気Kerr 効果についても評価した結果，Co 置換量の増大に伴い大きな磁気Kerr効果が得られたが，飽和磁化と磁気Kerr回転角のCo置換量に対する変化の傾向に違いが見られ，両者の発現機構は異なる可能性があることも判った． |
| （英） |
High saturation magnetization and perpendicular magnetic anisotropy are required for multiferroic (ferromagnetic / ferroelectric) thin film to apply magnetic writing element of magnetic nano-wire memory, which is a next-generation magnetic recording device. In this study, in the BiFeO3-based multiferroic thin film, the element substitution effect not only of Bi (A site) but also of Fe (B site) on magnetic properties was investigated. The Co substitution amount was varied from 0 at% to 28 at%. As a result, with increasing the amount of Co substitution, the saturation magnetization and perpendicular magnetic anisotropy increased. In addition, the magnetic Kerr effect of these films was also investigated, for their possibility to be applied to next-generation magneto-optical light modulator with ultra-low power consumption and high resolution. As a result, with increasing the amount of Co substitution, the magnetic Kerr rotation angle also increased. However, there was a difference in the tendency of changes between saturation magnetization and magnetic Kerr rotation angle with respect to the amount of Co substitution. This indicates that the expression mechanisms of both may be different. |
| キーワード |
（和） |
強磁性・強誘電薄膜 / 電界印加磁化反転 / 垂直磁気異方性 / 飽和磁化 / 磁気Kerr効果 / 新規磁気記録デバイス / 電界駆動型光変調素子 / |
| （英） |
Multiferroic thin films / Magnetic reversal by electric field / Perpendicular anisotropy / Saturation magnetization / Magnetic Kerr effect / New magnetic recording devices / Electric field driven magneto-optical light modulator / |
| 文献情報 |
映情学技報, vol. 45, no. 14, MMS2021-31, pp. 29-34, 2021年6月. |
| 資料番号 |
MMS2021-31 |
| 発行日 |
2021-06-03 (MMS) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
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