Pioneering of terahertz magnetization dynamics

2014 Fiscal Year Final Research Report

• Project/Area Number: 24686001
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Tohoku University
• Principal Investigator: MIZUKAMI Shigemi 東北大学, 原子分子材料科学高等研究機構, 教授 (00339269)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: テラヘルツ / スピントロニクス / ポンププローブ / 磁性体 / レーザー / エピタキシャル / スピンダイナミクス / 垂直磁化

Outline of Final Research Achievements

Pump-probe optical system with a high sensitivity and large applied field has been constructed, and films of various magnetic materials with high anisotropy and low magnetic moments have been fabricated and investigated. Pseudo-two dimensional layered magnet films were successfully grown, in which coherent magnetization precessional dynamics with frequency of 0.1 THz were observed. Furthermore, the compensated ferrimagnet with ultra-high magnetic anisotropy has been grown and precessional dynamics in THz wave range have been observed. These experimental results were qualitatively explained by the phenomenological model constructed in this research.

Free Research Field

スピントロニクス