Vector control of magnetizaion and magnetic phase transition via the inverse magneto-optical effects

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05454
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics I
• Research Institution: Kyushu University
• Principal Investigator: Satoh Takuya 九州大学, 理学研究院, 准教授 (40451885)
• Research Collaborator: HIMENO Kosei ; MATSUMOTO Keita
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 磁気光学 / スピン波 / フェムト秒レーザー / 反強磁性体 / フェリ磁性体 / 超高速 / 逆磁気光学効果

Outline of Final Research Achievements

The purpose of this research is ultrafast coherent control of magnetization using polarized ultrashort pulses. We investigated hexagonal manganite excited via the inverse magneto-optical effect and probed via the linear- and nonlinear magneto-optical effect. For the first time, we detected time-resolved coherent magnon via the nonlinear magneto-optical effect. Temperature dependence of the magnon relaxation time was performed and its mechanism was discussed. We also investigated transmission of spin wave through an air gap, both from the experiment and calculation. As a result, we observed evanescent spin wave.

Free Research Field

磁気光学