Determination of the properties of ionic vacancy by magnetic field

R. Aogaki, A. Sugiyama, M. Miura, Y. Oshikiri, M. Miura, R. Morimoto, I. Mogi, S. Takagi, Y. Yamauchi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Ionic vacancy is, being produced as a byproduct in electrode reaction, a polarized free space of the order of 0.1 nm surrounded by oppositely charged ionic cloud. As a perfect gas in electrolyte solution, it does not interplay with other solution particles. On the other hand, magnetic field provides useful means to examine the natures of it. Using a special electrode operated in a magnetic field called cyclotron MHD electrode (CMHDE), we first determined the lifetime of vacancy in copper deposition as 1.2 sec, which is extraordinarily long in comparison with the collision interval of solution particles. Then, using kinetic theory of gas, we measured the collision radius of vacancy gas to be 0.70 nm, which was consistent with theoretical calculation 0.65 nm.

Original languageEnglish
Article number012023
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 2018 Oct 13
Event9th International Symposium on Electromagnetic Processing of Materials, EPM 2018 - Awaji Island, Hyogo, Japan
Duration: 2018 Oct 142018 Oct 18


  • cyclotron MHD electrode
  • ionic vacancy
  • magneto-dendrite effect
  • nanobubble
  • perfect gas

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)


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