Electric Field Control of Fe Nano Magnets

DOI Web Site 6 References
  • Yamada T.K.
    Graduate School of Advanced Integration Science, Chiba Univ.
  • Gerhard L.
    Physikalisches Institut, Karlsruhe Institute of Technology (KIT)
  • Wesselink R.J.H.
    Physikalisches Institut, Karlsruhe Institute of Technology (KIT)
  • Ernst A.
    Max-Plank-Institut foer Mikrostrukturphysik
  • Wulfhekel W.
    Physikalisches Institut, Karlsruhe Institute of Technology (KIT)

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Other Title
  • 電界による鉄ナノ磁石の磁気相制御
  • デンカイ ニ ヨル テツ ナノ ジシャク ノ ジキソウ セイギョ

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Abstract

  Controlling metal magnet with electric field opens up a new pathway to fabricate metallic nonvolatile magnetic data-storage devices. Such magnetoelectric coupling has been studied mainly for insulators, e.g. complex multiferroic oxides. Although electric field applying to the bulk metals cannot go inside due to the screening by the conducting electrons, we found that magnetic phase of nano-scale iron metal magnets is able to be controlled by electric field pulses. All experiments were performed by scanning tunneling microscopy (STM) setup in ultra-high vacuum at 4K. Statistic switching of the magnetic phase between ferromagnetic bcc phase and layer-wise antiferromagnetic fcc phase as well as time response of the phase switching by a fast pulse were studied.

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