Characterization of the magnetic moments of ultrathin Fe film in an external electric field via high-precision X-ray magnetic circular dichroism spectroscopy

Takuya Tsukahara, Takeshi Kawabe, Koki Shimose, Taishi Furuta, Risa Miyakaze, Kohei Nawaoka, Minori Goto, Takayuki Nozaki, Shinji Yuasa, Yoshinori Kotani, Kentaro Toyoki, Motohiro Suzuki, Tetsuya Nakamura, Yoshishige Suzuki, Shinji Miwa

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7 Citations (Scopus)

Abstract

The magnetic moments of a PtjFe(0.5 nm)jMgO film at an external electric field of in a 0.35V/nm were characterized by analyzing the X-ray magnetic circular dichroism (XMCD) at the L-edges of Fe using a partial fluorescence yield method with a precision 40 times greater than that in our previous study. The XMCD induced by the electric field was negligible (<0.2%). Furthermore, although an induced orbital magnetic moment seemingly existed, it was within the precision error (0.3%). This paper demonstrates that slight electron doping and/or redistribution without any electrochemical reaction causes voltage-controlled magnetic anisotropy at FejMgO interfaces.

Original languageEnglish
Article number060304
JournalJapanese journal of applied physics
Volume56
Issue number6
DOIs
Publication statusPublished - 2017 Jun

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Tsukahara, T., Kawabe, T., Shimose, K., Furuta, T., Miyakaze, R., Nawaoka, K., Goto, M., Nozaki, T., Yuasa, S., Kotani, Y., Toyoki, K., Suzuki, M., Nakamura, T., Suzuki, Y., & Miwa, S. (2017). Characterization of the magnetic moments of ultrathin Fe film in an external electric field via high-precision X-ray magnetic circular dichroism spectroscopy. Japanese journal of applied physics, 56(6), [060304]. https://doi.org/10.7567/JJAP.56.060304