Journal Paper

• Felix Cüppers, Koji Hirai, Hiroshi Funakubo. On the switching dynamics of epitaxial ferroelectric CeO2-HfO2 thin film capacitors, Nano Convergence, Vol. 9, 56, Dec. 2022.
• Koji Hirai, Takahisa Shiraishi, Wakiko Yamaoka, RisakoTsurumaru, Yukari Inoue, Hiroshi Funakubo. Composition dependence of ferroelectric properties in (111)-oriented epitaxial HfO2-CeO2 solid solution films, Jpn. J. Appl. Phys., Vol. 61, pp. SN1019-1-5, Aug. 2022.

International Conference (Not reviewed / Unknown)

• K. Hirai, T. Shiraishi, W. Yamaoka, R. Tsurumaru, Y. Inoue, H. Funakubo. Composition dependence of ferroelectric properties in (111)-oriented epitaxial HfO2-CeO2 solid solution films, KJC-FE13 (The 13th korea-Japan Conference on Ferroelectrics), Sept. 2022.
• Felix Cueppers, Koji Hirai, Hiroshi Funakubo. Electrical study on ferroelectric Ce doped HfO2 epitaxial thin film capacitors, ISFD-15 (15th International Symposium on Ferroic Domains & Micro- to Nano-scopic Structures), Aug. 2022.

Domestic Conference (Not reviewed / Unknown)

• Koji Hirai, Takahisa Shiraishi, 山岡和希子, 鶴丸理沙子, 井上ゆか梨, HIROSHI FUNAKUBO. HfO2-CeO2膜の強誘電性の膜厚依存性, 第83回応用物理学会秋季学術講演会, Sept. 2022.
• Koji Hirai, Takahisa Shiraishi, 山岡和希子, 鶴丸理沙子, 井上ゆか梨, HIROSHI FUNAKUBO. (111)配向エピタキシャル(Hf,Ce)O2 膜における強誘電性の組成依存性の調査, 第39回強誘電体応用会議（FMA39）, June 2022.
• Koji Hirai, Takahisa Shiraishi, 山岡和希子, 鶴丸理沙子, 井上ゆか梨, HIROSHI FUNAKUBO. PLD法による(111)配向エピタキシャル(Hf,Ce)O2強誘電体膜の作製とその特性評価, 第69回応用物理学会春季学術講演会, Mar. 2022.

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