Laser-induced magnetization reversal investigated by time-resolved x-ray measurements
| Project/Area Number |
16K17722
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Wadati Hiroki 東京大学, 物性研究所, 准教授 (00579972)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 磁化反転 / レーザー / X線 / X線自由電子レーザー / SACLA / 強磁性 / 薄膜 / 合金 / 酸化物 / ペロブスカイト / シンクロトロン / ダブルペロブスカイト / 磁性 / 強相関電子系 / Ｘ線 / 表面・界面物性 / 物性実験 |
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| Outline of Final Research Achievements |
We tried to reveal the mechanism of magnetization reversal in ferromagnets by laser. As an experimental technique, we used time-resolved x-ray spectroscopy by synchronicity-radiation x-ray and x-ray free electron laser (XFEL). We mainly measured x-ray magnetic circular dichroism (XMCD). We performed time-resolved XMCD measurements in BL3 in SACLA (XFEL facility in Japan). By shining 800 nm Ti:sapphire laser as a pump light onto alloy FePt thin films with room-temperature ferromagnetism, we succeeded in time-resolved XMCD measurements at Pt L edges. The time scale of demagnetization is about 1 ps, found to be longer than that of Fe sites. Such element-resolved spin dynamics was first revealed by time-resolved XMCD.
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Report
(3 results)
Research Products
(21 results)
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[Journal Article] Thickness dependence and dimensionality effects on charge and magnetic orderings in La1/3Sr2/3FeO3 thin films2018
Author(s)
K. Yamamoto, Y. Hirata, M. Horio, Y. Yokoyama, K. Takubo, M. Minohara, H. Kumigashira, Y. Yamasaki, H. Nakao, Y. Murakami, A. Fujimori, and H. Wadati
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Journal Title
Phys. Rev. B
Volume: 97
Issue: 7
Pages: 75134-75134
DOI
Related Report
Peer Reviewed
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[Journal Article] Capturing ultrafast magnetic dynamics by time-resolved soft x-ray magnetic circular dichroism2017
Author(s)
Kou Takubo, Kohei Yamamoto, Yasuyuki Hirata, Yuichi Yokoyama, Yuya Kubota, Shingo Yamamoto, Susumu Yamamoto, Iwao Matsuda, Shik Shin, Takeshi Seki, Koki Takanashi, and Hiroki Wadati
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Journal Title
Appl. Phys. Lett.
Volume: １１０
Issue: 16
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] 時間分解共鳴軟X線回折で見るLa1/3Sr2/3FeO3の磁気秩序の光誘起変化2018
Author(s)
山本航平, 簔原誠人, Niko Pontius, 平田靖透, 横山優一, 深谷亮, 田端千紘, 山崎裕一, Christian Schssler-Langeheine, 組頭広志, 和達大樹
Organizer
日本物理学会 第73回年次大会
Related Report
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[Presentation] FePtPd薄膜の時間分解磁気円二色性測定2017
Author(s)
山本航平, 平田靖透, 田久保耕, 横山優一, 山本達, 大河内拓雄, 木下豊彦, 関剛斎, 高梨弘毅, 辛埴, 松田巌, 和達大樹
Organizer
第30回日本放射光学会年会・放射光科学合同シンポジウム
Place of Presentation
神戸芸術センター (兵庫県神戸市)
Year and Date
2017-01-07
Related Report
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[Presentation] FePtPd薄膜の時間分解磁気円二色性測定2017
Author(s)
山本航平, 平田靖透, 田久保耕, 横山優一, 山本達, 大河内拓雄, 木 下豊彦, 関剛斎, 高梨弘毅, 辛埴, 松田巌, 和達大樹
Organizer
第30回日本放射光学会年会・放射光科学合同シンポジウム
Related Report
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[Presentation] Kerr顕微鏡・X線磁気円二色性で見る垂直磁化Co/Pt薄膜2017
Author(s)
山本航平, 山本真吾, 大河内拓雄, 平田靖透, 横山優一, 田久保耕, 松田巌, 関剛斎, 木下豊彦, 高梨弘毅, 和達大樹
Organizer
日本物理学会 第72回年次大会
Related Report
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[Presentation] 垂直磁化膜Fe(Pt,Pd)の硬X線光電子分光と軟X線磁気円二色性2016
Author(s)
山本航平, 田久保耕, 堀尾眞史, 横山優一, 山本真吾, 久保田雄也, 松田巌, 平田靖透, 関剛斎, 池永英司, 高梨弘毅, 藤森淳, 尾崎泰助, 和達大樹
Organizer
日本物理学会 2016年秋季大会
Place of Presentation
金沢大学角間キャンパス (石川県金沢市)
Year and Date
2016-09-13
Related Report
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