Reversible change in the oxidation state and magnetic circular dichroism of Fe driven by an electric field at the FeCo/MgO interface

F. Bonell; Y. T. Takahashi; D. D. Lam; S. Yoshida; Y. Shiota; S. Miwa; T. Nakamura; Y. Suzuki

doi:10.1063/1.4802030

Reversible change in the oxidation state and magnetic circular dichroism of Fe driven by an electric field at the FeCo/MgO interface

F. Bonell, Y. T. Takahashi, D. D. Lam, S. Yoshida, Y. Shiota, S. Miwa, T. Nakamura, Y. Suzuki

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

The influence of an electric field on an ultrathin FeCo film was investigated by x-ray absorption spectroscopy and magnetic circular dichroism. Measurements were done on sub-millimeter sized pillars, with partial fluorescence yield detection. Fe L_2,3 absorption spectra revealed that partial oxidation of Fe occurred during the microfabrication. The oxidation state could be reversibly controlled by an electric field, which also induced variations of the dichroic signal. These results show that electrochemical phenomena may influence the magnetism at a ferromagnet/insulator interface.

Original language	English
Article number	152401
Journal	Applied Physics Letters
Volume	102
Issue number	15
DOIs	https://doi.org/10.1063/1.4802030
Publication status	Published - 2013 Apr 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4802030

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Reversible change in the oxidation state and magnetic circular dichroism of Fe driven by an electric field at the FeCo/MgO interface. / Bonell, F.; Takahashi, Y. T.; Lam, D. D.; Yoshida, S.; Shiota, Y.; Miwa, S.; Nakamura, T.; Suzuki, Y.

In: Applied Physics Letters, Vol. 102, No. 15, 152401, 15.04.2013.

Research output: Contribution to journal › Article › peer-review

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title = "Reversible change in the oxidation state and magnetic circular dichroism of Fe driven by an electric field at the FeCo/MgO interface",

abstract = "The influence of an electric field on an ultrathin FeCo film was investigated by x-ray absorption spectroscopy and magnetic circular dichroism. Measurements were done on sub-millimeter sized pillars, with partial fluorescence yield detection. Fe L2,3 absorption spectra revealed that partial oxidation of Fe occurred during the microfabrication. The oxidation state could be reversibly controlled by an electric field, which also induced variations of the dichroic signal. These results show that electrochemical phenomena may influence the magnetism at a ferromagnet/insulator interface.",

author = "F. Bonell and Takahashi, {Y. T.} and Lam, {D. D.} and S. Yoshida and Y. Shiota and S. Miwa and T. Nakamura and Y. Suzuki",

note = "Funding Information: We gratefully thank Y. Tamenori for supplying the SDD and T. Hirono for help in the measurements. Y.S. was supported by a Grant-in-Aid for JSPS Fellows. The XAS and MCD measurements were performed in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (Proposal Nos. 2011A1319, 2011B1720, and 2012A1671).",

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AU - Bonell, F.

AU - Takahashi, Y. T.

AU - Lam, D. D.

AU - Yoshida, S.

AU - Shiota, Y.

AU - Miwa, S.

AU - Nakamura, T.

AU - Suzuki, Y.

N1 - Funding Information: We gratefully thank Y. Tamenori for supplying the SDD and T. Hirono for help in the measurements. Y.S. was supported by a Grant-in-Aid for JSPS Fellows. The XAS and MCD measurements were performed in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (Proposal Nos. 2011A1319, 2011B1720, and 2012A1671).

PY - 2013/4/15

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AB - The influence of an electric field on an ultrathin FeCo film was investigated by x-ray absorption spectroscopy and magnetic circular dichroism. Measurements were done on sub-millimeter sized pillars, with partial fluorescence yield detection. Fe L2,3 absorption spectra revealed that partial oxidation of Fe occurred during the microfabrication. The oxidation state could be reversibly controlled by an electric field, which also induced variations of the dichroic signal. These results show that electrochemical phenomena may influence the magnetism at a ferromagnet/insulator interface.

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Reversible change in the oxidation state and magnetic circular dichroism of Fe driven by an electric field at the FeCo/MgO interface

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