Proceedings of the Korean Magnestics Society Conference (한국자기학회:학술대회 개요집)

  • 2010.06a
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  • Pages.94-94
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  • 2010
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  • 2233-9485(pISSN)
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  • 2233-9574(eISSN)
The Korean Magnetics Society (한국자기학회)
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Fast Precessional Motion of Co/Pd Multilayer Systems Induced by Heat Treatment

  • Sohn, Jeong-Woo (Department of Physics and Center for Nanospinics of spintronics Materials, Korea Advanced Institute of Science and Technology) ;
  • Lee, Kyeong-Dong (Department of Physics and Center for Nanospinics of spintronics Materials, Korea Advanced Institute of Science and Technology) ;
  • Song, Hyon-Seok (Department of Physics and Center for Nanospinics of spintronics Materials, Korea Advanced Institute of Science and Technology) ;
  • Kim, Seon-Ock (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Ji-Wan (Department of Physics and Center for Nanospinics of spintronics Materials, Korea Advanced Institute of Science and Technology) ;
  • Jeong, Jae-Woo (Department of Physics and Center for Nanospinics of spintronics Materials, Korea Advanced Institute of Science and Technology) ;
  • Shin, Sung-Chul (Department of Physics and Center for Nanospinics of spintronics Materials, Korea Advanced Institute of Science and Technology)
  • Published : 2010.06.10
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Abstract

Co/Pd multilayer systems have been investigated with much attention for a long time due to the high and easily controllable perpendicular magnetic anisotropy. Two [Pd(1)/Co(0.4 nm)]5 multilayer systems - one is as-deposit, and the other is annealed at $350^{\circ}C$ - are studied with an all-optical approach. A two-color optical pump probe setup using 30 fs laser pulse at 82 MHz repetition rate is used to measure the time-resolved magneto-optical Kerr signal. It turns out the heat treatment enhances the perpendicular magnetic anisotropy, and leads to faster magnetization precession. The frequency reaches 30 GHz in the annealed sample, which is a factor of 2 larger compared to the as-deposit film.

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