Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Switchable Uncompensated Antiferromagnetic Spins: Their Role in Exchange Bias

  • Lee, Ki-Suk (Nanospintronics Laboratory, School of Materials Science and Engineering, College of Engineering, Seoul National University) ;
  • Kim, Sang-Koog (Nanospintronics Laboratory, School of Materials Science and Engineering, College of Engineering, Seoul National University) ;
  • Kortright J.B. (Materials Sciences Division, LBNL, One Cyclotron Road) ;
  • Kim, Kwang-Youn (Advanced Metals Research Center, Korea Institute of Science and Technology) ;
  • Shin, Sung-Chul (Department of Physics, Korea Advanced Institute of Science and Technology)
  • Published : 2005.03.01
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Abstract

We report element-resolved and interface-sensitive magnetization reversals investigated from an oppositely exchange-biased NiFe/FeMn/Co structure by employing soft x-ray resonant Kerr rotation measurements. We have found not only switchable uncompensated antiferromagnetic regions with its sizable thicknesses at both interfaces of the FeMn layer but also their strong coupling to the individual ferromagnetic layers. These experimental results provide a better insight into experimentally observed reductions in exchange-bias field on the basis of an interface-proximity model proposed in this work.

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