铁磁性钆钴中激光诱导的皮秒自旋电流跨磁化补偿的起源

Guillermo Nava Antonio, Quentin Remy, Jun-Xiao Lin, Yann Le Guen, Dominik Hamara, Jude Compton-Stewart, Joseph Barker, Thomas Hauet, Michel Hehn, Stéphane Mangin, Chiara Ciccarelli
{"title":"铁磁性钆钴中激光诱导的皮秒自旋电流跨磁化补偿的起源","authors":"Guillermo Nava Antonio, Quentin Remy, Jun-Xiao Lin, Yann Le Guen, Dominik Hamara, Jude Compton-Stewart, Joseph Barker, Thomas Hauet, Michel Hehn, Stéphane Mangin, Chiara Ciccarelli","doi":"arxiv-2409.03088","DOIUrl":null,"url":null,"abstract":"The optical manipulation of magnetism enabled by rare earth-transition metal\nferrimagnets holds the promise of ultrafast, energy efficient spintronic\ntechnologies. This work investigates laser-induced picosecond spin currents\ngenerated by ferrimagnetic GdCo via terahertz emission spectroscopy. A\nsuppression of the THz emission and spin current is observed at magnetization\ncompensation when varying the temperature or alloy composition in the presence\nof a magnetic field. It is demonstrated that this is due to the formation of\ndomains in the GdCo equilibrium magnetic configuration. Without an applied\nmagnetic field, the picosecond spin current persists at the compensation point.\nThe experimental findings support the model for THz spin current generation\nbased on transport of hot spin-polarized electrons, which is dominated by the\nCo sublattice at room temperature. Only at low temperature a comparable\ncontribution from Gd is detected but with slower dynamics. Finally, spectral\nanalysis reveals a blueshift of the THz emission related to the formation of\nmagnetic domains close to magnetization compensation.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Origin of the laser-induced picosecond spin current across magnetization compensation in ferrimagnetic GdCo\",\"authors\":\"Guillermo Nava Antonio, Quentin Remy, Jun-Xiao Lin, Yann Le Guen, Dominik Hamara, Jude Compton-Stewart, Joseph Barker, Thomas Hauet, Michel Hehn, Stéphane Mangin, Chiara Ciccarelli\",\"doi\":\"arxiv-2409.03088\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The optical manipulation of magnetism enabled by rare earth-transition metal\\nferrimagnets holds the promise of ultrafast, energy efficient spintronic\\ntechnologies. This work investigates laser-induced picosecond spin currents\\ngenerated by ferrimagnetic GdCo via terahertz emission spectroscopy. A\\nsuppression of the THz emission and spin current is observed at magnetization\\ncompensation when varying the temperature or alloy composition in the presence\\nof a magnetic field. It is demonstrated that this is due to the formation of\\ndomains in the GdCo equilibrium magnetic configuration. Without an applied\\nmagnetic field, the picosecond spin current persists at the compensation point.\\nThe experimental findings support the model for THz spin current generation\\nbased on transport of hot spin-polarized electrons, which is dominated by the\\nCo sublattice at room temperature. Only at low temperature a comparable\\ncontribution from Gd is detected but with slower dynamics. Finally, spectral\\nanalysis reveals a blueshift of the THz emission related to the formation of\\nmagnetic domains close to magnetization compensation.\",\"PeriodicalId\":501083,\"journal\":{\"name\":\"arXiv - PHYS - Applied Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Applied Physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.03088\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.03088","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

稀土过渡金属铁磁体对磁性的光学操纵为超快、高能效的自旋电子技术带来了希望。这项工作通过太赫兹发射光谱研究了铁磁性钆钴合金产生的激光诱导皮秒自旋电流。在磁场存在的情况下,当改变温度或合金成分时,会观察到太赫兹发射和自旋电流在磁化补偿时受到抑制。研究表明,这是由于在钆钴平衡磁构型中形成了磁畴。实验结果支持基于热自旋极化电子传输的太赫兹自旋电流产生模型,该模型在室温下由钴亚晶格主导。只有在低温条件下,才能检测到来自钆的类似贡献,但其动力学速度较慢。最后,光谱分析揭示了太赫兹发射的蓝移,这与接近磁化补偿的磁畴的形成有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Origin of the laser-induced picosecond spin current across magnetization compensation in ferrimagnetic GdCo
The optical manipulation of magnetism enabled by rare earth-transition metal ferrimagnets holds the promise of ultrafast, energy efficient spintronic technologies. This work investigates laser-induced picosecond spin currents generated by ferrimagnetic GdCo via terahertz emission spectroscopy. A suppression of the THz emission and spin current is observed at magnetization compensation when varying the temperature or alloy composition in the presence of a magnetic field. It is demonstrated that this is due to the formation of domains in the GdCo equilibrium magnetic configuration. Without an applied magnetic field, the picosecond spin current persists at the compensation point. The experimental findings support the model for THz spin current generation based on transport of hot spin-polarized electrons, which is dominated by the Co sublattice at room temperature. Only at low temperature a comparable contribution from Gd is detected but with slower dynamics. Finally, spectral analysis reveals a blueshift of the THz emission related to the formation of magnetic domains close to magnetization compensation.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信