Ultrafast antiferromagnet rearrangement in Co/IrMn/CoGd trilayers
Zongxia Guo(郭宗夏)1,2, Gregory Malinowski2, Pierre Vallobra1,3, Yi Peng(彭懿)2, Yong Xu(许涌)1,3, Stéphane Mangin2, Weisheng Zhao(赵巍胜)1,3, Michel Hehn2, and Boyu Zhang(张博宇)1,†
1. Fert Beijing Institute, School of Integrated Science and Engineering, Beihang University, Beijing 100191, China; 2. Universit éde Lorraine, CNRS, IJL, Nancy, 54011 France; 3. Hefei Innovation Research Institute, Beihang University, Hefei 230012, China
Abstract Antiferromagnets offer great potential for high-speed data processing applications, as they can expend spintronic devices from a static storage and gigahertz frequency range to the terahertz range. However, their zero net magnetization makes them difficult to manipulate and detect. In recent years, there has been a lot of attention given to the ultrafast manipulation of magnetic order using ultra-short single laser pulses, but it remains unknown whether a similar scenario can be observed in antiferromagnets. In this work, we demonstrate the manipulation of antiferromagnets with a single femtosecond laser pulse in perpendicular exchange-biased Co/IrMn/CoGd trilayers. We study the dual exchange bias interlayer interaction in quasi-static conditions and competition in ultrafast antiferromagnet rearrangement. Our results show that, compared to conventional ferromagnetic/antiferromagnetic systems, the IrMn antiferromagnet can be ultrafast and efficiently manipulated by the coupled CoGd ferrimagnetic layer, which paves the way for potential energy-efficient spintronic devices.
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
Fund: The authors gratefully acknowledge the National Key Research and Development Program of China (Grant No.2022YFB4400200), the National Natural Science Foundation of China (Grant Nos.12104030, 12104031, and 61627813), the Program of Introducing Talents of Discipline to Universities (Grant No.B16001), the Beijing Municipal Science and Technology Project (Grant No.Z201100004220002), China Postdoctoral Science Foundation (Grant No.2022M710320), and China Scholarship Council. This work is also supported by the ANR-15-CE24-0009 UMAMI and the ANR-20-CE09-0013, by the Institute Carnot ICEEL for the project "Optic-switch" and Matelas, by the Région Grand Est, by the Metropole Grand Nancy, by the impact project LUE-N4S, part of the French PIA project "Lorraine Université d'Excellence", reference ANR-15-IDEX-04-LUE, and by the "FEDERFSE Lorraine et Massif Vosges 2014-2020", a European Union Program.
Corresponding Authors:
Boyu Zhang
E-mail: boyu.zhang@buaa.edu.cn
Cite this article:
Zongxia Guo(郭宗夏), Gregory Malinowski, Pierre Vallobra, Yi Peng(彭懿), Yong Xu(许涌), Stéphane Mangin, Weisheng Zhao(赵巍胜), Michel Hehn, and Boyu Zhang(张博宇) Ultrafast antiferromagnet rearrangement in Co/IrMn/CoGd trilayers 2023 Chin. Phys. B 32 087507
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