Electrical control of Curie temperature in cobalt using an ionic liquid film

K. Shimamura; D. Chiba; S. Ono; S. Fukami; N. Ishiwata; M. Kawaguchi; K. Kobayashi; T. Ono

doi:10.1063/1.3695160

Electrical control of Curie temperature in cobalt using an ionic liquid film

K. Shimamura, D. Chiba, S. Ono, S. Fukami, N. Ishiwata, M. Kawaguchi, K. Kobayashi, T. Ono

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

116 Citations (Scopus)

Abstract

The electric field effect on magnetization properties and Curie temperature of Co ultra-thin films has been investigated. An electric field is applied to a Co film by using an electric double layer (EDL) formed in a polymer film containing an ionic liquid. The change in the Curie temperature is ∼100 K by applying the gate voltage of ±2 V, suggesting that the observed large modifications of magnetization properties are attributed to the significant change in the Curie temperature, which is induced by a large amount of carrier density control due to the formation of the EDL.

Original language	English
Article number	122402
Journal	Applied Physics Letters
Volume	100
Issue number	12
DOIs	https://doi.org/10.1063/1.3695160
Publication status	Published - 2012 Mar 19
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3695160

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title = "Electrical control of Curie temperature in cobalt using an ionic liquid film",

abstract = "The electric field effect on magnetization properties and Curie temperature of Co ultra-thin films has been investigated. An electric field is applied to a Co film by using an electric double layer (EDL) formed in a polymer film containing an ionic liquid. The change in the Curie temperature is ∼100 K by applying the gate voltage of ±2 V, suggesting that the observed large modifications of magnetization properties are attributed to the significant change in the Curie temperature, which is induced by a large amount of carrier density control due to the formation of the EDL.",

author = "K. Shimamura and D. Chiba and S. Ono and S. Fukami and N. Ishiwata and M. Kawaguchi and K. Kobayashi and T. Ono",

note = "Funding Information: The authors thank M. Tabuchi (DAISO Co., Ltd.) for his technical support about making polymer film containing the ionic liquid. The work at Kyoto University was partly supported by the PRESTO program from JST, Grant-in-Aid for Young Scientists (A) from MEXT, Grant-in-Aid for Scientific Research (S) from JSPS. The work at CRIEPI was partly supported by Grant-in-Aid for Young Scientists (A) from MEXT.",

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AU - Shimamura, K.

AU - Chiba, D.

AU - Ono, S.

AU - Fukami, S.

AU - Ishiwata, N.

AU - Kawaguchi, M.

AU - Kobayashi, K.

AU - Ono, T.

N1 - Funding Information: The authors thank M. Tabuchi (DAISO Co., Ltd.) for his technical support about making polymer film containing the ionic liquid. The work at Kyoto University was partly supported by the PRESTO program from JST, Grant-in-Aid for Young Scientists (A) from MEXT, Grant-in-Aid for Scientific Research (S) from JSPS. The work at CRIEPI was partly supported by Grant-in-Aid for Young Scientists (A) from MEXT.

PY - 2012/3/19

Y1 - 2012/3/19

N2 - The electric field effect on magnetization properties and Curie temperature of Co ultra-thin films has been investigated. An electric field is applied to a Co film by using an electric double layer (EDL) formed in a polymer film containing an ionic liquid. The change in the Curie temperature is ∼100 K by applying the gate voltage of ±2 V, suggesting that the observed large modifications of magnetization properties are attributed to the significant change in the Curie temperature, which is induced by a large amount of carrier density control due to the formation of the EDL.

AB - The electric field effect on magnetization properties and Curie temperature of Co ultra-thin films has been investigated. An electric field is applied to a Co film by using an electric double layer (EDL) formed in a polymer film containing an ionic liquid. The change in the Curie temperature is ∼100 K by applying the gate voltage of ±2 V, suggesting that the observed large modifications of magnetization properties are attributed to the significant change in the Curie temperature, which is induced by a large amount of carrier density control due to the formation of the EDL.

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Electrical control of Curie temperature in cobalt using an ionic liquid film

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