| Project/Area Number |
18K18311
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 80040:Quantum beam science-related
|
|---|
| Research Institution | Osaka University (2019)
Japan Synchrotron Radiation Research Institute (2018) |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2018-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
|
|---|
| Keywords | 時分割 / XMCD / 走査型X線顕微鏡 / 磁化過程 / 確率論的 / ポンププローブ法 / X線磁気円二色性 / 磁化家庭 / 軟X線MCD顕微鏡 / ポンプ-プローブ / 磁化反転ダイナミクス |
|---|
| Outline of Final Research Achievements |
The magnetization process is a phenomenon, whose time and spatial region are widely dispersed. Especially, stochastic reversed domain nucleation and domain wall propagation remains unclear because there is not a well established method to observe such stochastic phenomenon with high time and spatial resolution. Thus, in this study, in order to divide this stochastic behavior to its elements, a new method, in which a wave height of each pulse X-ray are analyzed to probability distribution, was developed. As a result, magnetic imaging technique with 100 kHz-wave height analysis for transmitted X-ray was established with soft X-ray magnetic circular dichroism microscope.
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した手法は，未だ改善の余地があるものの，確率論的な現象に関して，サブナノ秒オーダーの時間分解能かつサブミクロンオーダーの空間分解能で測定可能性のある数少ない手法である．試料や磁場領域に関して限定的であるものの，理論・実験両面で未開拓な部分の多いMHz帯の磁化過程の理解に関して今後有用であると考えられる．
また，本研究では軟X線磁気円二色性顕微鏡を用いた磁気イメージングに特化して開発を行ったが，手法の概念自体は種々の反応過程に応用可能であり，他の応用分野に関しても拡張可能であると考えられる．
|
