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 journalArticlepeer-review

103 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 languageEnglish
Article number122402
JournalApplied Physics Letters
Volume100
Issue number12
DOIs
Publication statusPublished - 2012 Mar 19
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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