Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo

LU, Xangyang, ZOU, Xiao, HINZKE, Denise, LIU, Tao, WANG, Yichuan, CHENG, Tuyan, WU, Jing, OSTLER, Thomas, CAI, Jianwang, NOWAK, Ulrich, CHANTRELL, Roy, ZHAI, Ya and XU, Yongbing (2018). Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo. Applied Physics Letters, 113 (3), 032405.

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Using the time-resolved magneto-optical Kerr effect method, helicity dependent all-optical magne- tization switching (HD-AOS) is observed in ferrimagnetic TbFeCo films. Our results reveal the individual roles of the thermal and nonthermal effects after a single circularly polarized laser pulse. The evolution of this ultrafast switching occurs over different time scales, and a defined magnetization reversal time of 460 fs is shown—the fastest ever observed. Micromagnetic simulations based on a single macro-spin model, taking into account both heating and the inverse Faraday effect, are performed which reproduce HDAOS demonstrating a linear path for magnetization reversal.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre
Departments: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
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Depositing User: Thomas Ostler
Date Deposited: 23 Jul 2018 12:07
Last Modified: 16 Nov 2018 14:16

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