Ultrafast antiferromagnet rearrangement in Co/IrMn/CoGd trilayers  

作　　者：郭宗夏 Gregory Malinowski Pierre Vallobra 彭懿 许涌 Stéphane Mangin 赵巍胜 Michel Hehn 张博宇 Zongxia Guo;Gregory Malinowski;Pierre Vallobra;Yi Peng;Yong Xu;Stéphane Mangin;Weisheng Zhao;Michel Hehn;Boyu Zhang(Fert Beijing Institute,School of Integrated Science and Engineering,Beihang University,Beijing 100191,China;Universitéde Lorraine,CNRS,IJL,Nancy,54011 France;Hefei Innovation Research Institute,Beihang University,Hefei 230012,China)

机构地区：[1]Fert Beijing Institute,School of Integrated Science and Engineering,Beihang University,Beijing 100191,China [2]Universitéde Lorraine,CNRS,IJL,Nancy,54011 France [3]Hefei Innovation Research Institute,Beihang University,Hefei 230012,China

出　　处：《Chinese Physics B》2023年第8期109-114,共6页中国物理B（英文版）

基　　金：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);China Scholarship Council;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 Universitéd’Excellence,”reference ANR-15-IDEX-04-LUE;by the“FEDERFSE Lorraine et Massif Vosges 2014-2020,”a European Union Program。

摘　　要：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/Ir Mn/Co Gd 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 Ir Mn antiferromagnet can be ultrafast and efficiently manipulated by the coupled Co Gd ferrimagnetic layer,which paves the way for potential energy-efficient spintronic devices.

关 键 词：ANTIFERROMAGNET FERRIMAGNET exchange bias all-optical switching 

分 类 号：O469[理学—凝聚态物理]