Ultrafast heat pulse magnetization switching near compensation condition in GdFeCo

DOI Web Site 被引用文献4件 参考文献1件
  • Yoshikawa H.
    Graduate School of Science and Technology, Nihon University
  • Kogure S.
    Graduate School of Science and Technology, Nihon University
  • Toriumi S.
    Tokyo Keiki Inc.
  • Sato T.
    Graduate School of Science and Technology, Nihon University
  • Tsukamoto A.
    College of Science and Technology, Nihon University
  • Itoh A.
    College of Science and Technology, Nihon University

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  Femtosecond laser pulse excitation of multi-sub-lattice rare-earth (RE) transition-metal (TM) ferrimagnets opens the way to trigger ultrafast precessional switching and moreover all-optical magnetization switching (AOS). This AOS phenomena originated from sub-lattice nature is fundamentally different from conventional magnetic field driven switching mechanism. In this study, we show that the AOS efficiently works even near compensation composition ratio Ccomp or compensation temperature Tcomp that makes hardness to magnetic field driven net-magnetization (Mnet) reversal. Under the various conditions of Mnet, all optically created domain sizes were almost determined by only the condition of laser excitation. Furthermore, we suggested that the switching domain area can be estimated by a fluence threshold Wft.

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