Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Composition Dependence of Perpendicular Magnetic Anisotropy in Ta/CoxFe80-xB20/MgO/Ta (x=0, 10, 60) Multilayers

  • Lam, D.D. (Graduate School of Engineering Science, Osaka University) ;
  • Bonell, F. (Graduate School of Engineering Science, Osaka University) ;
  • Miwa, S. (Graduate School of Engineering Science, Osaka University) ;
  • Shiota, Y. (Graduate School of Engineering Science, Osaka University) ;
  • Yakushiji, K. (National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center) ;
  • Kubota, H. (National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center) ;
  • Nozaki, T. (National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center) ;
  • Fukushima, A. (National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center) ;
  • Yuasa, S. (National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center) ;
  • Suzuki, Y. (Graduate School of Engineering Science, Osaka University)
  • Received : 2012.10.19
  • Accepted : 2013.01.23
  • Published : 2013.03.31
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Abstract

The perpendicular magnetic anisotropy of sputtered CoFeB thin films covered by MgO was investigated by vibrating sample magnetometry. Three different $Co_xFe_{80-x}B_{20}$ alloys were studied. Under out-of plane magnetic field, the saturation field was found to increase with increasing the Co content. The magnetization and interface anisotropy energy were obtained for all samples. Both showed a marked dependence on the MgO overlayer thickness. In addition, their variations were found to be non-monotonous as a function of the Co concentration.

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References

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