Manipulation of Magnetization Switching by Ultrafast Spin‐Polarized Hot‐Electron Transport in Synthetic Antiferromagnet

Abstract: Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is becoming indispensable both at the fundamental level and to develop future spin‐based electronics. Recently it has been shown that femtosecond pulsed‐laser excitation of magnetic thin films produces intense and ultrafast spin‐polarized hot electrons, thus attracting a lot of attention. While spin‐polarized hot electrons are known to play a pivotal role in the ultrafast laser‐induced demagnetization, their effect on magnetization switching remains an open issue. This study uncovers the effect of spin‐polarized hot electrons generated by laser excitation on magnetization switching in a Co/Pt based perpendicular magnetic anisotropy‐based synthetic antiferromagnet (p‐SAF) using the time‐resolved magneto‐optical Kerr effect. It has been found that, at low pump fluence, the equivalent magnetic field generated by the hot‐electron spin current plays a dominant role in assisting the magnetization switching of the lower layer in the antiferromagnetic configuration, while the strong thermal stability of the Ruderman Kittel Kasuya Yosida exchange interaction inhibits the further weakening of the switching field at high pump fluence. This study provides a viable way to control the magnetization switching of the antiferromagnetically exchange‐coupled systems for spintronic applications with ultrafast control of the information operation.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Manipulation of Magnetization Switching by Ultrafast Spin‐Polarized Hot‐Electron Transport in Synthetic Antiferromagnet ; day:12 ; month:03 ; year:2023 ; extent:7
Advanced electronic materials ; (12.03.2023) (gesamt 7)

Creator
Ma, Meiyang
Li, Zhuoyi
Ruan, Xuezhong
Wu, Jing
Wang, Ruifeng
Liu, Tianyu
Du, Jun
Lu, Xianyang
Xu, Yongbing

DOI
10.1002/aelm.202201331
URN
urn:nbn:de:101:1-2023031314015828873774
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
14.08.2025, 10:57 AM CEST

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Associated

  • Ma, Meiyang
  • Li, Zhuoyi
  • Ruan, Xuezhong
  • Wu, Jing
  • Wang, Ruifeng
  • Liu, Tianyu
  • Du, Jun
  • Lu, Xianyang
  • Xu, Yongbing

Other Objects (12)